They may give you a bonus, let's say in the form of free spins... And then your free spins may end up netting you 20$ in winnings. Well,.you will find out that free spins are limited to up to 5$ per giveaway of free spins... And then you at least have 5$ right? Well, no! You still have to fulfill a wagger limits. And your 5$ had to be staggered at least to a gross turnover of $300! That's 60x... And not only that, you can only wagger on a selection of slot games and nothing else. If the wagering could be done on dice or something with low house edge, whatever. But they really really don't want you to win anything by forcing you to play slots with 5$.
Anyway. When I see something like this for free spins I'll be sure to never use any deposit bonus in such casino. Bonuses don't have to be huge when you're forced to lose everything. Just give a few cents and might as well keep it simple and give nothing. Right?
If we read the requirements more attentively, we can find all these restrictions, but i don`t want to search it. I want to get easy terms like - i deposit $100, get $10 free spins, everything i`ve got - i can withdraw any moment.
I can`t say that i don`t use such casinos, but i stopped hunting bonuses and ignore games, i don`t interest in. If i got free spins - i could spend it and, may be, play several games for money. Now i don`t care how many free spins i have - i willn`t spent even penny for such games.