If I remember right, each new account has the same subs subscribed to by default. Idk what they are and won’t make a new account to find out lol. I assume those are the ones.

I’ve nothing to add just want to say this is an interesting question

Funny, askreddit, and gaming are the most popular. I’d assume gaming would generate the most

It seems the “Am I the…” subs are always on the front page. I assume they’re getting some from those subs.