I know its too early to make request since this site is still new but it would be better if you would be accepting some altcoins other than these two
considering that fees are very high nowadays.
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XRP,DOGE,TRX or LTC would be ideal.
I tend to agree with the idea, high fees will just a hindrance for others to deposit on the site, and it isn't sustainable in the long term for every gamblers. There are gamblers who aren't have that much bankroll and I guess they got high tx fees will be huge compare to what they can afford to gamble.
By the way, welcome to the forum and it's good to know that even new you've already focus on the promotions side, that's massive I suppose and good thing you've decide @Hhampuz to manage it. The site has good UX and UI, I really mean it.