What is an Ad? Can I tweet that I drink Pepsi if Coke is today's official Twitter sponsor? We all can see where this leads. No doubt Twitter doesn't want to a b

What is an Ad? Can I tweet that I drink Pepsi if Coke is today's official Twitter sponsor? We all can see where this leads. No doubt Twitter doesn't want to a become plain, old, boring ad sponsor. Like on TV. Or like Facebook. They really should do more to create entirely new types of ads, which most people would not even consider as being an ad.