Generally we lose VIP status if we elect not to receive the emails. I just laugh them off and delete them. I have thought about marking them as spam but it might not be a good idea if they email you a bonus or a promo.
Same with the "reminder" emails to take a survey. No thanks. Why should I do something for *them* when they've been so stingy towards us?
The kicker for me was the All Double promotion being EXTENDED and then being quickly ending earlier than originally planned. I would have dined a lot more in the last 3 months of this year had this promo been in affect.
+1
Just one net positive I've noticed in year end 2010: I've noticed a lot of new restaurants joined the program in the Bay Area as of late. I see that some restaurants that I frequent from time to time are there. I'll get the stingy miles when I can, better than nothing. One caveat is that many of the new restaurants I've seen are only offering rewards on select days. Make sure to check before you go!