There could be other reasons, I've seen casinos and companies not being able to operate in certain countries due to them being to lazy, or just not being able to obtain a license for the country, although if it's a decently big casino and country, don't think that would be a big problem.

I don't much experience with mobile gaming, but from what little I've seen, it doesn't look like we've actually seen a lot of competitions in the industry, and it'll be pretty hard to set up lobbies and monitor schools using a completely different API. It's just easier to capitalize of PC gaming right now, which I'm assuming is why they haven't dived in the mobile industry yet.

P2P wages are a good idea, and it'll be the only way you'll be able to profit of the market. I'd personally recommend doing something similar to a project that was popular in the CS:GO scene a couple years back, known as Kickback.com.

They ran their own tournaments and wagers, where people would take 1v1's for money. Worked pretty well, and some huge wagers went on that site, and that combined with a great customer service team and easy cashouts, made it pretty good to use.

Another question. I see you've added TFT and OW, but why no CS? It's probably the most popular game to make wagers/bets on and has a pretty big userbase.