Online casinos that have no wagering requirements are very rare. Almost all casinos require you to bet a certain amount before you can withdraw the bonus, to prevent people from taking their money and then leaving without playing. However, you can win free spins that only have as requirements to bet a multiple of the amount you win from these.
So, for example, you may have to bet 40 times your earnings from the free spins and at least have pure profit in these cases. We are always available to guide players to the best bonuses, whether they are welcome bonus or free spins.