The Visa card offer is for REWARD credits and not tier points. In this case it's $100 of comps.

I like FAB's observation: it is just another way to make the Diamond lane even more crowded. Keep in mind that at some locations, Diamonds and 7 Stars are in the same line. So those of you who think 7 Stars makes you "special" remember that the VIP next to you could be a Diamond. Hope that doesn't hurt too much. :-)