@tldr
I feel this so hard with Bracket.
We've been running versions of social sports betting for 2 years now. Every new product shows you *something* about what really works.
I've genuinely enjoyed playing every Bracket iteration... but the billion dollar question is:
"What product can find & land & keep new users?"
(You gotta hit all three of find/land/keep. Even batting .667 isnt enough. No one said it would be easy.)