Never had the pop up problem, but did have the problem with the ads that drag you to the bottom of the page. Then the "attack of the pop ups" started happening. Some posters on other threads warned that the pop ups could lead to serious porn sites, so I installed AdGuard for Safari and the one for iOS (free versions). No more pop ups or dragging ads -- so far, so good. And, like other posters have noted, the problem only happened for me on this site.