Gama Casino offers an existing-player deposit bonus of up to 99. The minimum deposit is 1000 ₽ and the bonus code is BEVZ.
Bonus funds work on slots only. Wagering conditions apply; check the terms before you deposit. The code goes in the bonus field at the cashier: enter BEVZ, confirm the deposit, and the extra funds land on top of it.
The offer suits players who already hold an account and want more play on slots for a deposit of 1000 ₽ or more. The amount tops out at 99, which keeps the extra funds modest next to the deposit. It's worth reading the full terms on the casino site first.