Say a casino is offering a 100% welcome casino bonus up to £50, with a wagering requirement of 25 times the bonus which is (25×100 = £2500 total wagering requirement). Blackjack is allowed but roulette, sicbo, craps and baccarat are not. You receive the bonus as soon as you deposit making it easier to clear the requirements. You can simply check how much you have wagered via the cashier. Expected return would be from £38 to £60.