I do believe most of the money is now coming from appearing on the Babestation channels and doing Webcam shows, and no doubt they are whoring privately to richer London and Arabian businessmen (after all, why earn £150 - £200 an hour when they can earn a hell of a lot more from wealthier guys). A few of the Babestation girls are well known for going to Dubai on 'Holidays' which they always boast about on Twitter.
A good 99% of the women in that pornstar profiles thread are utterly fucking hideous creatures. The US produces Champions League level of pornstars while the UK produces Conference League, constant relegation battlers.