I'm not sure why prepaid cards aren't accepted on those sites, yet the legit escort sites do.
I have a prepaid card with a bank that is actually linked to an account and it don't work
I was advised by one company that they do not accept prepaid credit cards as acceptable for payment.
This is because said companies terms require the customer to be over 18.
Some Prepaid credit cards can be legitimately obtained by under 18 year olds.
Therefore
all Prepaid credit cards are not acceptable as proof of age, to this company.
I then paid using a normal credit card without issue.