X50 wagering requirement is really impossible to achieve and I don't think even high rollers will attempt to complete that kind of promotion bonus. I haven't seen that type of bonus yet, the highest I've seen so far was a x10 wager required which is still not easy to attain for me.
I always ignore those type of promotion as they require the me to really gamble my whole bankroll. I can't play wisely like withdrawing early since I have a minimum wager requirement to do before getting the bonus. At x2 and above wager requirement, the risk-reward ratio for getting the bonus is not worth it for me.
It is not impossible, it is possible but the chance is quite small. I can say this because I have once completed 50x wagering requirement on a casino long time ago from a No Deposit Bonus.
30-50x is basically standard wagering requirement on deposit bonus so if you find a bonus with 10x, it must be a great offer and it should not be missed especially for those who likes to play slot games, can you tell me which casino give 10x wagering requirement on deposit bonus?
For player's pov, yes 30-50x is a huge wagering requirement but for the casino's pov, this can be said as the safest number for them to keep the business healthy because they are not charity lol.