I paced some bets several months ago. And now decided to make a new depo to test the platform again. Now it looks more polish and stable, 1% commission on winning bets very competitive. I wold like to place more bets on this platform, but most markets have very low liquidity.

For small deposits and withdrawals I'd suggest you implement Lightning Network (LN), also good solution at this time is to add wrapped bitcoins on low fee networks like
1.TronBTC,
2. WBTC on EOS.
3. Binance’s Bitcoin BEP2 or BTCB

Off course for big amounts You should accept only native (main chain) BTC transaction for now.

Lighting Network support will also gives significant promo boost in Bitcoin community if you make proper announcements.

I would also suggest you add sidebar where will be highlighted some markets like:
Most liquid markets. (markets with highest liquidity)
Most active markets (markets with highest amount of bets)
Lowe margin markets (markets with lowest margin between sides)

Hope Exbet gets more active users in the future.