Gordon Ramsay

according to google, jamie oliver is worth $300 million, while gorrdon ramsay is wirth $60 million. ramsay's number is expected, considering how many shows he has plus the restaurants, but I'm shocked at jamie's net worth. I've really only seen him on youtube, and nothing more. Going on wikipedia, I see that he's published tons of books and has tons of restaurants too, but it seems like the majority of his wealth could not have come from the restaurants, especially with many of them closing, which must mean it must've come from the books. To my knowledge, publishers and everyone else take something like 90% from book sales. So, I find it hard to believe that jamie has made $300 million mostly from books, as that would likely mean his the books themselves would have generated literal billions of dollars in sales, and maybe that's the case, but I find that really unlikely.

based on what ive seen on the internet, i would have expected ramsay and jamie to have similar net worths, maybe even ramsay making a bit more, considering how much more popular he is online. So, why is jamie oliver's net worth 5x that of ramsay's just curious.