Cingular is promoting Google SMS

I have to admit that I'm a big fan of many (but not all) Google products. One product that I'm a fan of is Google SMS. I've turned quite a few people on to this since I started using it more than 9 months ago and I still have people coming back to me telling me about how useful it is to them. And in spite of now having access, through Cingular's EDGE network, to mobile versions of Google's local search, I still use Google SMS fairly often. So I was pleased to see my cell phone carrier, Cingular, promoting Google SMS to subscribers in a recent e-mail newsletter I received:



Is Google paying for this or is Cingular simply deriving extra text messaging revenue from this?