I just checked a few other forums I'm a member of on Tapatalk and they don't have any ads but here I have a lot.
Doesn't matter what I click on, home, unread, new posts etc every 2nd post is an ad, then in forum threads they put ads in between replies etc.
I've only been on these forums a few weeks but I've actually gotten used to ignoring them until you mentioned it.
I guess money has to be raised somehow, on the desktop forum the ads can be less intrusive. Like placed on the top and sides and bottom where you aren't focused on, but Tapatalk it's smack bang in the middle of everything you look at.