https://standupjack.com is a side project I started earlier this year on my own. It's making more than $1k/mo now :-)
FYI, you have a typo in the FAQ: "Can I change the time I get asked for an update?". I think "change my time" should be "change my settings".
How did you promote your bot? Just through the Slack store?
How does it make money?
Curious if they've tried other pricing models. Beyond, say, 10 or 20 users the value proposition shifts against that pricing model IMO.