The question "Can you win money on free spins?" usually comes up after a bonus has vanished, taking its winnings with it. The cause is almost always a condition in the terms: a deadline that passed, a withdrawal made too early, a cap on winnings or a clause about irregular play. Each of these can be seen in advance, and a short read of the terms shows which of them apply to a given offer.
Bonus terms include clauses on irregular play, and they are written broadly. Typical examples are betting on both sides of an even money bet, switching to low risk play to clear wagering, raising stakes sharply after a bonus is converted, or opening more than one account per person or household. A casino that finds such a pattern can void the bonus and its winnings. Reading the clause shows which patterns a casino names, and which ones it leaves to its own judgement.
Every bonus has a deadline, and usually two: one for claiming it and one for completing its wagering requirement. When the second passes, the bonus and any winnings still tied to it are removed, however close the requirement was to completion. Deadlines range from a day for free spin winnings to several weeks for a large match. The clock often starts at the deposit, which means a slow first session already uses part of the available time.
Casinos can change their bonus terms, and most promise that a bonus already claimed stays under the version accepted at the time. The promise matters only if the version can be shown, so saving the terms on the day an offer is taken is worth the minute it costs. The same goes for anything support agrees in chat: a saved copy of the conversation settles more disputes than a memory of it.
Typical examples include betting both sides of an even money bet, switching to low risk play to clear wagering, or sharply raising stakes after conversion.
Often yes. Asking to withdraw while a bonus is active can remove the bonus and its winnings, and some casinos apply this to the deposited cash too.
The bonus and any winnings still tied to it are removed, however close the requirement was to completion, and the clock often starts at the deposit.
Casinos can revise their terms, though most promise that a bonus already claimed stays under the version the player accepted at that time.