Jerry Seinfeld follows whatever pays him to follow. Personally, he is a sworn Porsche loyalist and I read an article a while ago that said he has close ties to Porsche and that the first car of any new Porsche line to roll out is usually reserved for Jerry. That, too, may have just been paid advertising. Much of the information we consume is usually paid advertising (in one form or another) these days anyway.
Edited post to say.... I take it back! Jerry is a true Porsche fanatic. My neighbor is a Porsche fanatic. He has a Panamera Turbo, Cayenne Turbo and a GT2. He recently told me of an encounter he had with Jerry on the highway one night. They raced each other and then came to a stop, side-by-side. Other driver rolled down his window and it turned out it was Jerry in his Porsche (don't recall which model my neighbor mentioned). Jerry says to my neighbor "I have one of those at home." and then got out and made some car chat with him for a few minutes.