Just to add onto this discussion, this isn't a desktop specific problem. I frequently use Tapas' mobile website as well as the app. When I'm using the mobile website, I get relocated to "Congratulations, you're our 100000th visitor" style spam sites. Sometimes, it happens when I'm in the middle of reading something. It'll even happen when I'm just trying to open a comic or novel. As far as I can recount, this has happened to me for as long as I've had this phone, so it's not a case as to whether or not I'm infected (and if it is, it's only related specifically to the Tapas website as this doesn't happen anywhere else).
As of now, this doesn't happen when I'm using the official Tapas app.