Amazon Prime free trial more than once?

[Matt]

I have already used the free trial and then cancelled it before the charge, because I am using my money but put on someone else's card, so I didn't want to spend more than I had. Anyway, whenever I cancelled the free trial, next to my account it said "Try Prime" again, and lets me sign up for the trial again. I want to know if this is just a glitch or something and I'll get in trouble if I do it again, or I will be forced to pay after the trial is over, or if it actually lets me do it more than once.

[Joseph]

I wouldn't risk it. Unless you're a student, you don't get it for six months. It will charge you for renewal, which it might be asking to do for all that I know. If it's an error, they can still charge you later.