What is your monetization model for your game? It might not be a huge issue if you know you'll get way more than $0.20 per user. If you were selling a game for $10, this is minor. If you're making a f2p game where there's no guaranteed income and most of your players will not spend a dime, it's a lot riskier. I'd worry about the install counts getting spoofed by angry players, but that seems like a bigger liability for Unity than developers.