Hey, it's not like any of this is my fault. Tell that to porn hub, XNXX, xHamster, etc.
I hadn't really thought much about this but I can think of a couple of reasons why very low resolutions are still around.
First, there's a lot of really, really old shit on the free porn sites. So if something was originally recorded at 240p, there's not much you can do about that unless you want spend a shit load of money trying to scale them up.
Second, bandwidth costs money. If you can get away with giving the free customers shit that's so low res, then the leachers don't cost you as much.
Finally, most normal people can't afford really high quality smart phones. I know people that still use ancient flip phones. So you're not going to have the kind of unlimited storage you need to shoot hundreds of hi res pics and video.