In my opinion this is a very good concept, pretty similar to the current PvP gaming plataforms such as Kickback.com, but no one till now (at least i don't have knowledge of any) that the payment system is in a cryptocurrency. You guys should keep in mind that slow servers equals to less users to your website. So bring fast and high tick servers (like faceit servers with 128 tick). I only play CS:GO but other games are important too since not everyone plays what i play.

Good luck with your project!