Or, more realistically, he could pay shit all for a domain name (.io, .ly is so last year) 10 usd/month for a VPS, 3% to Stripe (which is criminally high, but there you go) and have access to the global market. He is more likely to get customers and he isn't constrained to change pennies.
Apparently I didn't make the comment very clear: he should build a webapp instead. Make it a game if you want, but build it outside their walled gardens.
But web-based games/apps don't sell very well at all, compared to iOS and Android native apps (even if the native are built with the same web technologies).
Unless it's a service website, the monetization for web apps just isn't up to par.
Sure, thats the problem. You pay 3% of the transaction for them to make a couple of entries in a database. It is laughable, when you consider that hosting and access to the VPS cost very little.