SBC Yahoo DSL $26.95 forever!?

My yearly promotion DSL rate of $26.95 exired this month :( So I called SBC to try to get a better rate or else I was going to switch to Comcast. But before I threatened, the SBC representative said that I can be "rerated" at the current promotion of $26.95 if I commit to another year. But he also told me that in order to get that rate, I would have to add some phone calling features to my current plan, otherwise it would be $30/month. So I decided not to add any features and accept the $30/month. The next day, it occured to me that it didnt make sense that I was not given the $26.95 rate. So I made another call to SBC. I told her what the other representative told me and she just went ahead and changed it back to $26.95. She told me that after 12 months the price will go back to the regular rate of $49.99, unless I call back again. So I guess Ill be calling them every year so I can always get the promotional rate. Weird eh?