My birthday is this month, and my email inbox and mailbx have both been filled with coupons for free goodies. Arby's, Dairy Queen, Cold Stone, Indian Casino free play (random) and my favorite, Starbucks, to name a few. I received a FREE Starbucks drink (that's any Starbucks drink!) for registering a Starbucks card here.
Don't overlook the benefit of filling out online forms that ask for your birthday! You may get a few unwanted emails, but most of the time it is so worth it