I'm a VIB, too. Hadn't really "reaped the benefits" of it yet. Not interested in any of the products redeeming the 500 pts will get me (and I could get more than one at the moment, lol), so I just hoard points till they come out with more Nars freebies (they did it once, so I'm hopeful).
I buy way too much from there. I need to get more of a discount than that one-time 10% (which I didn't even use b/c it just about cover's sales tax and I don't need more stuff right now).
Sometimes I wish MAC had something like this. I have purchased a ton of MAC stuff lately, and don't really feel like a very important customer...
B2M doesn't really compare.