I've been getting a lot of offers of late. I got a 0%+3% (max $75), which I used. At least it's good for a year, so a good return. On some accounts it's a 1.99% plus 3%, no cap, which is no good. I just tear up those.

I also get 0%, no fee, which I use on occasion. I just make sure it's deposited after the statement has closed. That way I get almost 2 months of totally free money.