I just paid off a Payday loan I took out with United Cash Loans (yes, I know, I shouldn't have done that, online payday loans mean trouble blah blah blah). I've learned my lesson on ALL payday loans, not just online, but from any place that has those horrid words in huge letters.
For future reference, if anyone takes out a loan with United Cash Loans, be advised it is VERY difficult to pay it off. I took out a $300 PD loan in April and they charged my account every two weeks a $90 renewal fee.