I don't think we should get to a casino just because they are having good deposit bonuses or sign-up bonuses. Yes, we should look after them but that should not be the choosing criteria for any casino. I don't really get how it could be anyways. This is a one-time process, it could get you some bonus and kick start on any casino but that could not last forever.
Moreover, there are many bonuses, or most of the bonuses which require high wagering and it could be double the bonus amount or 25x or something like that. Also, the legitimacy of casinos can not be explained by the bonuses but by the way they operate.
Actually, that's what gamblers have to do, but sometimes the display of bonuses with large numbers makes gamblers not rational enough to consider many things, not only considering the wager requirements but also whether the casino can be trusted enough if it's a new casino, because we often see that promising deposit bonuses are new casinos to attract lots of players.
Because at a new casino we don't know exactly how they will run the casino, how capable they are of paying the winnings of each player, which could have passed the wager requirements that have been set and in the end the player has a large balance that he wants to withdraw.
There are still many gamblers who are stuck with this and complain when they experience unpleasant things because they are too tempted by the promised bonuses