Is it politics lol?
I don't know. I used to think about this a lot, and didn't really get anywhere.
Could be a combination of population and internet usage. That's the simplest answer I can think of: the USA just has a lot of people who are online.
It's because freedom! Murica stands for freedom and pple love freedom!! Murica! (Jk) But, pple love Harry Potter too. 👉👈 Hope this helps.