Poor analogy; Google is considered an ad company because that is how they get their revenue. From some Googling, it seems that Einstein made money from being a

Poor analogy; Google is considered an ad company because that is how they get their revenue. From some Googling, it seems that Einstein made money from being an academic fellow, royalties on inventions, and giving lectures. So he seems like he's a physics guy (although figuring out problems to work on, speaking, politicking, etc. also come into play.)