You are missing something though:
Walt Disney has been quoted, "I don't make films in order to make money....I make money in order to make film."
I suspect Clarkson, May, and Hammond are similarly motivated.
I agree thats what Walt Disney wanted. I doubt the same applies to Clarkson and co.
Firstly Clarkson sold off all his remaining shares in Top gear to the BBC for a nice multi-million pound lump sum.
If he wanted to stay in control, and continue to puruse his passion, it would have made more sense to keep his share in Top Gear, rather than cash in for short term profit. Royalties would have rolled in for years to come, instead all profits go to BBC now.
Hammond is fairly well known for doing anything to make a quick buck. He will put his name to anything if the money is right.
May, portrays an old school british nerd type, but from most people who have met him said, its just a portrayed character and he is generally a miserable cu#t. He does his routine and gets a few spin off series off the back of it.
Clarkson made the cash as an owner of the brand, Hammond and May had a nice little earner riding on Clarksons coat tails.