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Thanks for your feedback. Actually the communication market is picking up. We are not dependant on slack we are an API which can be plugged to any chat service like Hipchat kato etc.
We are working closely with Slack team to get this going. I don't foresee that happening since we promote people to get on board with slack. It's a win win. But I do get your point :) thanks for the feedback.
I'm being facetious, but Twitter clients were a win-win for Twitter too, until they decided they weren't.