For the sake of it, I installed Tapatalk and tried using GBAtemp on it. Besides being clunky as all get out, I didn't see any hoT SinGlEs IN mY ArEa. Maybe I just have to use Tapatalk a bit more, but I'd rather...not.
Googling the issue showed tons of people having these same adverts as you, though...on various forums, ranging from GameFAQs...to porn ads on Tapatalk's own forum itself! So the issue very very fortunately is not with GBAtemp or any ad related business on the site...but instead is with whatever in the world Tapatalk is doing on their end.
Change is obviously difficult--I'm sure if I had to deal with the site in a fashion that wasn't how I'd done things for the past handful of years, I'd be upset too. But it seems that the only thing to do is fork over money because Tapatalk seems to be trying to eke cash out of its users by not caring about the ads it's hosting, or to use GBAtemp on the mobile page.