How Free Spins Work in Practice
A batch of spins is attached to one named slot, or to a short list of them, at a fixed stake. You open that game, the spins run before your own balance is touched, and whatever they return lands as bonus funds rather than cash — which is where the wagering requirement applies. Once the batch is used up the game reverts to your own stake.
The order matters at 20Bet, whose terms say real money in the balance is staked before bonus money. A deposit made while a bonus is still running is therefore spent first, and only one bonus can be active on an account at a time — related deposit bonuses cannot be stacked. Jackpot slots sit outside bonus play entirely, so spins cannot be used on them.
The practical consequence is that a free-spins offer is worth planning around rather than collecting. On 20Bet’s unlimited-bonus card, the deposit you make decides the spin value for the whole batch, so splitting one large deposit into several small ones produces more spins at a lower value. Which of those is better depends entirely on the slot you intend to play them on.