I had the same problem reaching upon reaching PLT.
This is how I look at it. If you are PLT, 500 points is crap, worth 1 / 40th of a normal minimum decent one night 20,000 per night room. So why bother, you've probably got tons otherwise...
Better to get the cheap bottle of red wine for a cheap buzz (and nuts) to take home and collect the $100 every so often when it doesn't deliver.
Other view points?