The multiplier matters less than the sum it applies to. A requirement of thirty times the bonus on a bonus of one hundred units means three thousand units of stakes, while thirty times the deposit plus the bonus doubles that figure on a full match. Terms state the base in a single line that is easy to skip. Working out the total turnover before accepting shows the real size of the task, and it often turns an attractive headline into a modest offer.
While a bonus is active, most terms set a maximum stake per spin or per hand, often a small fixed amount or a share of the bonus. A single bet above it, even by accident, can be enough for the casino to remove the bonus and its winnings. Some games let the stake be raised mid session with no prompt at all, so the limit is worth setting in the game before starting. The rule usually ends once the requirement is met.
Some titles are excluded from bonus play altogether, often slots with a high return or with features that could be used to clear a requirement cheaply. Playing an excluded game with bonus funds can void the bonus and every win attached to it, even when the game loads without any warning. The list usually sits at the end of the bonus terms or on a separate page. Checking it before the first spin avoids losing a balance to a rule nobody mentioned anywhere in the lobby.