Some tough questions because I think you can handle them :)
---
What happens if/when Twitch builds these tools into their app? (if possible, don't answer with "we hope they acquire us")
Per your website, it's "100% free" -- how do you make money? My hunch is that Twitch streamer viewership has a long-tail -- some tent-pole users (might pay for tools) and then tons of small <100 viewer amateurs (will never pay for tools).
What, if any, steps are you taking to ensure that the viewer engagement is real and not people idling in chatrooms for hours on end to 'farm' points? The value proposition to stream advertisers could be hurt if the numbers are inflated by 'zombie' users.