300% Crypto Casino Bonus: Fourth-Deposit Caps and Conversion Rules

OSbet's 4th Deposit Bonus is Stage 4 of 4 — the final and biggest stage of the deposit bonus series, unlocked once the wagering requirement on the 3rd Deposit Bonus is cleared. It matches a fourth deposit at 300%, with a minimum participation of 30 USDT or the equivalent in another supported coin.

It's only available to players who've completed Stage 3, on their fourth deposit.

The maximum bonus reaches 2,000 USDT at this stage, the highest of all four. Depositing and applying an amount moves both the deposit and the 300% bonus into the Activity Wallet, the same locked structure used in every earlier stage.

For example, applying a 100 USDT deposit adds a 300 USDT bonus, for 400 USDT total sitting in the Activity Wallet.

Stage 4's wagering requirement is the highest in the series at 35x the combined participation amount and bonus. On that same 100 USDT deposit, the target works out to (100 + 300) × 35 = 14,000 USDT.

It's the steepest multiplier of the four stages, matching the biggest bonus cap — worth calculating against your own deposit size before applying, same as at every earlier stage.

Qualifying games haven't changed throughout the series: only slots count toward wagering, PG Soft and JILI titles are excluded entirely, and live casino, table games, arcade games, fishing games and sportsbook bets don't contribute.

Meeting the 35x requirement releases up to 2,000 USDT from the Activity Wallet to the Cash Wallet, fully withdrawable with no forfeiture on the bonus once the requirement is met.

Completing Stage 4's wagering requirement finishes the entire Deposit Bonus Series — across all four deposits, that adds up to as much as 750% in total bonuses (120% + 150% + 180% + 300%), among the larger multi-stage matches available at a crypto casino.