Some time back I converted some points from an online offer somewhere to Marriott Rewards. I had only ever earned QF FF points from Marriotts before and have my account set to earn them automatically. Nothing I've ever seen says that there are some things that airline points won't be earned for, but apparently there are some.

So, in short, I have 500 Marriott points that I don't appear to be able to do anything with. Is there any way to convert them to anything?