slackin: Not getting invites

I set up and successfully deployed to Heroku using the link via the README. I even accounted for the issue #11. However when I test the landing page with an email, none is sent.

Is there something else others have done to get a response?

Heroku logs:

2015-02-11T10:24:19.975754+00:00 app[web.1]: Wed Feb 11 2015 10:24:19 GMT+0000 (UTC) – fetching
2015-02-11T10:24:20.145465+00:00 app[web.1]: Wed Feb 11 2015 10:24:20 GMT+0000 (UTC) – online 5, total 52 (+170ms)
2015-02-11T10:24:21.146938+00:00 app[web.1]: Wed Feb 11 2015 10:24:21 GMT+0000 (UTC) – fetching
2015-02-11T10:24:21.303834+00:00 app[web.1]: Wed Feb 11 2015 10:24:21 GMT+0000 (UTC) – online 5, total 52 (+157ms)
2015-02-11T10:24:22.305397+00:00 app[web.1]: Wed Feb 11 2015 10:24:22 GMT+0000 (UTC) – fetching
2015-02-11T10:24:22.485901+00:00 app[web.1]: Wed Feb 11 2015 10:24:22 GMT+0000 (UTC) – online 5, total 52 (+180ms)
2015-02-11T10:24:23.488368+00:00 app[web.1]: Wed Feb 11 2015 10:24:23 GMT+0000 (UTC) – fetching
2015-02-11T10:24:23.658190+00:00 app[web.1]: Wed Feb 11 2015 10:24:23 GMT+0000 (UTC) – online 5, total 52 (+169ms)
2015-02-11T10:24:24.659772+00:00 app[web.1]: Wed Feb 11 2015 10:24:24 GMT+0000 (UTC) – fetching
2015-02-11T10:24:24.928736+00:00 app[web.1]: Wed Feb 11 2015 10:24:24 GMT+0000 (UTC) – online 5, total 52 (+269ms)
2015-02-11T10:24:25.931078+00:00 app[web.1]: Wed Feb 11 2015 10:24:25 GMT+0000 (UTC) – fetching
2015-02-11T10:24:29.932759+00:00 app[web.1]: Wed Feb 11 2015 10:24:29 GMT+0000 (UTC) – online 5, total 52 (+4002ms)
2015-02-11T10:24:30.941297+00:00 app[web.1]: Wed Feb 11 2015 10:24:30 GMT+0000 (UTC) – fetching
2015-02-11T10:24:31.152618+00:00 app[web.1]: Wed Feb 11 2015 10:24:31 GMT+0000 (UTC) – online 5, total 52 (+211ms)
2015-02-11T10:24:32.162730+00:00 app[web.1]: Wed Feb 11 2015 10:24:32 GMT+0000 (UTC) – fetching
2015-02-11T10:24:32.330541+00:00 app[web.1]: Wed Feb 11 2015 10:24:32 GMT+0000 (UTC) – online 5, total 52 (+168ms)
2015-02-11T10:24:33.332090+00:00 app[web.1]: Wed Feb 11 2015 10:24:33 GMT+0000 (UTC) – fetching
2015-02-11T10:24:33.519315+00:00 app[web.1]: Wed Feb 11 2015 10:24:33 GMT+0000 (UTC) – online 5, total 52 (+188ms)
2015-02-11T10:24:34.520937+00:00 app[web.1]: Wed Feb 11 2015 10:24:34 GMT+0000 (UTC) – fetching
2015-02-11T10:24:34.682489+00:00 app[web.1]: Wed Feb 11 2015 10:24:34 GMT+0000 (UTC) – online 5, total 52 (+162ms)
2015-02-11T10:24:35.682969+00:00 app[web.1]: Wed Feb 11 2015 10:24:35 GMT+0000 (UTC) – fetching
2015-02-11T10:24:35.861516+00:00 app[web.1]: Wed Feb 11 2015 10:24:35 GMT+0000 (UTC) – online 5, total 52 (+179ms)
2015-02-11T10:24:36.862752+00:00 app[web.1]: Wed Feb 11 2015 10:24:36 GMT+0000 (UTC) – fetching
2015-02-11T10:24:37.127527+00:00 app[web.1]: Wed Feb 11 2015 10:24:37 GMT+0000 (UTC) – online 5, total 52 (+265ms)
2015-02-11T10:24:38.129095+00:00 app[web.1]: Wed Feb 11 2015 10:24:38 GMT+0000 (UTC) – fetching
2015-02-11T10:24:38.421819+00:00 app[web.1]: Wed Feb 11 2015 10:24:38 GMT+0000 (UTC) – online 5, total 52 (+293ms)
2015-02-11T10:24:39.424489+00:00 app[web.1]: Wed Feb 11 2015 10:24:39 GMT+0000 (UTC) – fetching
2015-02-11T10:24:39.593630+00:00 app[web.1]: Wed Feb 11 2015 10:24:39 GMT+0000 (UTC) – online 5, total 52 (+169ms)
2015-02-11T10:24:40.594730+00:00 app[web.1]: Wed Feb 11 2015 10:24:40 GMT+0000 (UTC) – fetching
2015-02-11T10:24:40.851706+00:00 app[web.1]: Wed Feb 11 2015 10:24:40 GMT+0000 (UTC) – online 5, total 52 (+257ms)
2015-02-11T10:24:41.853813+00:00 app[web.1]: Wed Feb 11 2015 10:24:41 GMT+0000 (UTC) – fetching
2015-02-11T10:24:42.141332+00:00 app[web.1]: Wed Feb 11 2015 10:24:42 GMT+0000 (UTC) – online 5, total 52 (+288ms)
2015-02-11T10:24:43.143348+00:00 app[web.1]: Wed Feb 11 2015 10:24:43 GMT+0000 (UTC) – fetching
2015-02-11T10:24:43.410473+00:00 app[web.1]: Wed Feb 11 2015 10:24:43 GMT+0000 (UTC) – online 5, total 52 (+267ms)
2015-02-11T10:24:44.411609+00:00 app[web.1]: Wed Feb 11 2015 10:24:44 GMT+0000 (UTC) – fetching
2015-02-11T10:24:44.665309+00:00 app[web.1]: Wed Feb 11 2015 10:24:44 GMT+0000 (UTC) – online 5, total 52 (+254ms)
2015-02-11T10:24:45.667205+00:00 app[web.1]: Wed Feb 11 2015 10:24:45 GMT+0000 (UTC) – fetching
2015-02-11T10:24:45.938724+00:00 app[web.1]: Wed Feb 11 2015 10:24:45 GMT+0000 (UTC) – online 5, total 52 (+271ms)
2015-02-11T10:24:46.939923+00:00 app[web.1]: Wed Feb 11 2015 10:24:46 GMT+0000 (UTC) – fetching
2015-02-11T10:24:47.103133+00:00 app[web.1]: Wed Feb 11 2015 10:24:47 GMT+0000 (UTC) – online 5, total 52 (+163ms)
2015-02-11T10:24:48.104902+00:00 app[web.1]: Wed Feb 11 2015 10:24:48 GMT+0000 (UTC) – fetching
2015-02-11T10:24:48.370181+00:00 app[web.1]: Wed Feb 11 2015 10:24:48 GMT+0000 (UTC) – online 5, total 52 (+266ms)
2015-02-11T10:24:49.372348+00:00 app[web.1]: Wed Feb 11 2015 10:24:49 GMT+0000 (UTC) – fetching
2015-02-11T10:24:49.626760+00:00 app[web.1]: Wed Feb 11 2015 10:24:49 GMT+0000 (UTC) – online 5, total 52 (+254ms)
2015-02-11T10:24:50.628973+00:00 app[web.1]: Wed Feb 11 2015 10:24:50 GMT+0000 (UTC) – fetching
2015-02-11T10:24:50.882872+00:00 app[web.1]: Wed Feb 11 2015 10:24:50 GMT+0000 (UTC) – online 5, total 52 (+254ms)
2015-02-11T10:24:51.884993+00:00 app[web.1]: Wed Feb 11 2015 10:24:51 GMT+0000 (UTC) – fetching
2015-02-11T10:24:52.141961+00:00 app[web.1]: Wed Feb 11 2015 10:24:52 GMT+0000 (UTC) – online 5, total 52 (+257ms)
2015-02-11T10:24:53.144203+00:00 app[web.1]: Wed Feb 11 2015 10:24:53 GMT+0000 (UTC) – fetching
2015-02-11T10:24:53.305251+00:00 app[web.1]: Wed Feb 11 2015 10:24:53 GMT+0000 (UTC) – online 5, total 52 (+161ms)
2015-02-11T10:24:54.307368+00:00 app[web.1]: Wed Feb 11 2015 10:24:54 GMT+0000 (UTC) – fetching
2015-02-11T10:24:54.492582+00:00 app[web.1]: Wed Feb 11 2015 10:24:54 GMT+0000 (UTC) – online 5, total 52 (+185ms)
2015-02-11T10:24:55.493674+00:00 app[web.1]: Wed Feb 11 2015 10:24:55 GMT+0000 (UTC) – fetching
2015-02-11T10:24:55.664586+00:00 app[web.1]: Wed Feb 11 2015 10:24:55 GMT+0000 (UTC) – online 5, total 52 (+171ms)
2015-02-11T10:24:56.665823+00:00 app[web.1]: Wed Feb 11 2015 10:24:56 GMT+0000 (UTC) – fetching
2015-02-11T10:24:56.926372+00:00 app[web.1]: Wed Feb 11 2015 10:24:56 GMT+0000 (UTC) – online 5, total 52 (+261ms)
2015-02-11T10:24:57.928192+00:00 app[web.1]: Wed Feb 11 2015 10:24:57 GMT+0000 (UTC) – fetching
2015-02-11T10:24:58.096278+00:00 app[web.1]: Wed Feb 11 2015 10:24:58 GMT+0000 (UTC) – online 5, total 52 (+168ms)
2015-02-11T10:24:59.097533+00:00 app[web.1]: Wed Feb 11 2015 10:24:59 GMT+0000 (UTC) – fetching
2015-02-11T10:24:59.365226+00:00 app[web.1]: Wed Feb 11 2015 10:24:59 GMT+0000 (UTC) – online 5, total 52 (+268ms)
2015-02-11T10:25:00.367286+00:00 app[web.1]: Wed Feb 11 2015 10:25:00 GMT+0000 (UTC) – fetching
2015-02-11T10:25:00.527206+00:00 app[web.1]: Wed Feb 11 2015 10:25:00 GMT+0000 (UTC) – online 5, total 52 (+160ms)