Which is why it's so easy to get hold of and the market is flooded with it.
Without professionals shooting it, relying on amateurs to shoot, provide 2257 documents, model releases and license is obviously not working. Yes lots of it is produced by real amateurs, BUT THEY AIN'T SELLING IT LEGITIMATELY. If they were there would be no shortage.
How do you know that none of the girls in the pictures you posted are under 18. That any of them signed a model release, that any of the content was licensed, that any of the girls will take the sites to court for publishing their images. OR GO AFTER THE BILLING COMPANY FOR THE SITE?
You don't because you scraped the content off sites that probably scraped it off other sites. That's called pirating by the site and you. Or is it acceptable to repost any content once it's on the Internet?
All the things you point out can be easily learned or not by getting a complete amateur to shoot the stuff, as I said. The problem is getting good looking girls willing to do this, on a legal basis, for the money that's being offered.
You show your ignorance of producing legal content. I've been doing it for 33 years. How long have you been doing it?
Cheap asses or can't afford to pay more?
We can't shoot a girl in a nightclub getting drunk, in bulk? Of course we can. We're just not doing it for $300 a set. Party Hardcore do it all the time with hundreds of girls. But it costs a little more than $150 a set.
And there's the answer to stocktrader.
Fill a nightclub with cute girls, do the 2257 and model release before they go in, ply them with drinks (that they agreed to in the model release) then shoot them on mobile phones and cheap cameras. Offering $50 to flash their tits or panties and $100 to flash their pussy. Party Hardcore do it with girls giving male strippers blow jobs. So flashing ain't a problem. Paying for it is.
But as stocktrader said the niche is full of cheap legal content.