Chaturbate; payment methods seem complicated , help?. ?

So there is a choice between epay, paxum,cosmo, and wire transfer. I heard sketchy things about those so wire transfer seems the safest. However it says make a minimum of $500 to get a pay out. Does that mean just once when u first start or is that all the time?. That seems insane , so models have to make 500 each time in order to get acces to their money?.