If the bonus expires uncleared, it is typically removed from your account along with any winnings generated from it. A typical structure limits free spin winnings to £50 or a fixed multiple of the spin value, regardless of how large the individual wins are. If a casino excludes low-house-edge games from wagering, the effective cost of clearing the bonus is higher than the face value of the requirement suggests. Some casinos exclude them from bonus wagering entirely.
It is a conditional offer that requires you to wager your own money to unlock it. If the terms are worse than expected, you may be stuck with them. We treat vague or deliberately complex terms as a red Zarbet Casino flag regardless of how attractive the headline offer looks. Above 40x is difficult to clear and significantly erodes the bonus value. We cover both types in detail in our dedicated guides to sticky bonuses and non-sticky bonuses.
A high-wagering bonus on games you would not otherwise play is a different proposition. You are going to wager that money regardless, and the bonus gives you extra funds to do it with. A low-wagering bonus on a game you enjoy playing anyway can represent genuine value. If it applies to deposit plus bonus, you need to wager £8,000. If the requirement applies to the bonus only, you need to wager £4,000. That is worth factoring into whether a bonus suits how you actually play.