Sticky bonus

A bonus type where the bonus amount itself is permanently locked to the account. You can play with it and win from it, but the bonus principal is deducted from any withdrawal.

Example: €100 deposit + €100 sticky bonus. You wager through, bankroll ends at €300. You can withdraw €200 (deposit + winnings above bonus). The €100 sticky is discarded.

Sticky bonuses are rare in mainstream operators today; they’re more common in crypto casinos and some legacy operators. Read the T&C carefully — a headline “50% match” that turns out to be sticky is worth roughly half the equivalent non-sticky bonus.