Start with the wagering multiplier, not the headline amount

A large bonus headline can hide the real cost of claiming it: the wagering multiplier. If a £100 bonus carries a 40x requirement, the player must generate £4,000 of eligible play before requesting a withdrawal from bonus winnings. That figure, not the banner number, is the one that decides whether the offer suits your bankroll. The wildzy casino promotions page should be read alongside its terms table, because the table supplies the multiplier and the banner usually does not.

Check which games count toward playthrough

Game weighting is the second trap, and it is often more expensive than the multiplier itself. A £10 slot spin may count as £10 toward playthrough, while a £10 blackjack hand might count as £1 or be excluded entirely. That difference changes the effective cost of the bonus by a factor of ten or more. Before opting in, open the eligible-games list and compare the weighting for the titles you actually play; if your favourite game is capped at 10%, the advertised bonus is not the one you are getting.

Map the withdrawal cap and time limit

Bonus terms usually combine three limits: maximum bet while wagering, maximum cashout from bonus winnings, and an expiry date. A £500 cashout cap on a £100 bonus means that even after clearing £4,000 of play, anything above £500 may be removed. A 30-day expiry can also make a low-stakes plan impossible if the required turnover is too high. Write both numbers down before depositing; if the cap and deadline do not fit your normal play, skip the offer or ask support to confirm the exact figures.

Use a small test deposit and record the terms

A practical check is to make the smallest eligible deposit, claim the bonus, and record the terms shown in the cashier before playing. Screenshot the wagering progress bar, the game-weighting page, and the expiry date. If the cashier shows a different multiplier from the promotions page, stop and contact support before placing more bets. The takeaway is simple: treat the cashier terms as the controlling version, and never chase a bonus whose playthrough requirement you cannot calculate in advance.