I don't know why but I have a bad feeling about them... first the fact that they say they have a user base of millions, sounds like those indian scammers that say their miracle snake oil drug has cured millions of people. Second the fact that they will only tell the details 7 days after on the post payout. Third, the only "proof" that they have now that they got a product is a screenshot, which anyone can do, just go to fiverr and pay someone to do something similar for 5 bucks... Fourth, they could have very well got someone known on STEEM like u, for example, to check their product out, but nope, most big guys have no knowledge of this... It's just a little suspicious, let's hope I'm wrong though, STEEM really needs more dapps, games, and devs on it...