EDIT: I actually just checked and what I said earlier is not completely true. First, it does redirect me to the Tapatalk app when I actually open a subforum, which ends up opening it in a browser window within Tapatalk. Second, I looked through the settings, and it appears that the setting is that Tapatalk opens all "supported links" in the app (which you can change to make it ask you first, or not do it at all). However, this list of supported links appears to be hardcoded into the app somehow, so it does seem to be something that the forum admins should take up with the Tapatalk people. My guess is that it may not be resolvable until they update the app next, but not sure how this is handled in the backend.
Also just want to say that while I understand the reasons for disabling Tapatalk (and I noticed the spam), without push notifications for the app I don't visit the forums at all, as they let me know if anything interesting has come up without me spending time checking. Otherwise I usually forget it's a thing, especially b/c I'm not chasing anything on the Exchange. Bit of a bummer.