Thanks for the info! I've tried incognito, using a different device, resetting my router. Following that blacklist check, turns out I am on one blacklist for some reason. I've requested to be removed and asked them to let me know why I'm suddenly on the list in the first place, now I guess I wait. When I thought it was only Reddit, that was fine because Reddit isn't Reddit anymore anyway. But finding that you're blocked by a whole lot of web pages is kinda depressing. I mean, I ended up following the chain all the way to Reddit's registrar (gandi.net) and I'm blocked by all of them, registrar included. Same thing with anything to do with CDC Global.
Thanks again for the info, hope that this is sorted out easily.