I do participate from time to time in deposit bonuses as it can be interesting depending on the wagering requirement. Sometimes it is 30x and while that is still extremely hard to do, it is possible to do. Best bonuses for me are like weekly or monthly bonuses without any wagering requirement.
Weekly or monthly bonuses comes without wagering requirement because most of them are basically a rakeback from your previous week/month wagering activity. The more wager you did, the higher bonus you'll get unless the casino use fixed amount for the bonus. Weekly and monthly bonus become a trend since Stake introduced it and maybe Stake is the first casino provide weekly and monthly bonus. After that some other casinos are following this type of promotion.
And it seems it also depends on the level of membership you have. If your level is high, your bonus will be high. But for those who haven't been able to reach a high level, there's no need to think about it seriously because one day, they will also get a bonus from the casino. It could be that the bonus is a loyalty bonus because they have been playing for so long, and the casino appreciates it. Or they can get other entertainment bonuses that casinos usually provide for their members. Getting weekly and monthly bonuses will certainly provide another pleasure because we can use them to play gambling, which is very useful if we don't have money to gamble.