There has to be a stability between the gambler and the casino when the gambler has to be more active to get the bonus and the casino gives the gambler something to be more active.
So that a good stability is formed between the two and of course it will go well and gamblers will also feel at home in the casino.
Actually gamblers expect bonuses from gambling, which is good.
Because some gamblers naturally want bonuses so they won't be in vain active in gambling.
The truth is, we all have individual points of interest and in some cases, we may defer in beliefs and aspirations, while a lot of gamblers may want constant bonuses from the casino, some others may only want to get the best they can with their deposits since it wager requirements before withdrawals are not same.
Good point, there are many opinions regarding to that concern, for those who are okay with what the casino is offering they will just accept it and enjoy, while for those who are collecting or looking for good bonuses, the chance that they will explore and find other places to maximize what they are aiming is also possible.
We do have different take and for small time player/gambler, it will be okay if what we can get from the house and how we can take some edge to make it worthy when we decided to withdraw our money.