Not all the www designated places have reduced miles awards ( though most of reduced ones all seem to have the www)
It appears that designation is used when it appears the restaurant will not stay long in the program, had one locally that seemed to participate for one month only.

You may be right about the " pre-reserved award" types have been discontinued since they pissed me off when I tried to use it twice.
1) I selected a dining time and ate at the restaurant, but since I didnt get a confirming e-mail from-idine,I got no credit.
2) Called in to select a dining time to be told " all the slots for the time-frame have been already allocated "

That being said by all appearances the Tampa selection seems to be really very good as compared to other cities I have been and includes a number of my favorite places.
Mike