Just made an order from my prime account. It went into processing in 30 seconds.
I think from a regular account using amazon fsss you'll have plenty of time to cancel though.
For some reason I have two accounts associated with my email address. Same address, different password.
One is prime the other isn't. So you're saying order from Amazon (non prime) and cancel immediately? Am I better off canceling online (IIRC Amazon has that option), or over the phone?