Just went this morning, rang up 2 $200 Visa cards for $393.90. Did it twice. Then I asked the cashier if I can get more, she said "the rules say no, but I don't mind." Got another two sets.
This is so much better than staples rebates that come in 2 months. True there's no visa savings, but you can get a lot more done here than finding so many addresses for staples