1 cent per point, I prefer to get better but would go down to 0.8c for high rate properties.
Marriott's category system for properties is basically designed to find what the market will bear, so if we collectively won't pay a points amount for a hotel it should drop down a category.
The inflated points relative to revenue rates occur in heavily targeted areas where everyone and their kids want to go on vacation, and where folks don't care (or don't know any better) if they burn their points at 0.5c per point.