Thoughts on 2 generalizations mentioned here:

Business hotels=full service: aren't CYs marketed (or were) as business hotels?

Categories follow rates: I'm staying at a SHS north of Boston this weekend where, using the 5th night free (and booking before it went from a Cat. 2 to 3), I was able to get over 0.02 per point. Heck, it would have been cheaper to outright buy the points than to pay the cash rate - by several hundred dollars, in fact.