Of all the other cryptocurrencies you could choose as payment method, why did you pick ethereum? I know it's second to bitcoin in terms of market capitalization and maybe popularity BUT THE FEES!
Btc transaction fees is already quite high when sending in most days [weekdays] but Eth is just the same or could be even more expensive. Perhaps you can add another alternative there such as Litecoin or Doge.
I would say XRP or TRX if it's about fees and almost instant deposits and withdrawals. These kind of things like fees and fast deposit/withdrawal is to be in consideration as always, I too like this preference when I am trying to play on a gambling site.
No question to be asked but I have a suggestion like keeping more eSport games on your site not just CSGO, there are other eSports out there that on the rise lately.