What I have a problem with is not the 10k or 30k or whatever they charge, they can charge me anything they want and I will decide for myself so that is not where the problem lies and I am fine with having that "option". The real problem is I pay let's say 30k right? And a few others do pay 30k as well, and then I look at the transaction ID and I see that there are 5 people like me who withdrew and most likely they paid 30k as well and then the transaction fee was paid 20k, which means they got 150k and only paid 30k, not even full price of one of those people, making them a hefty 130k profit.
They don't do do batch cashouts, at least not in my experience. I guess it's possible, although unlikely, that if they had to do a review or something they might send a few in the same tx when review is complete, but usually it's instant cashout and tx has 1 output.