The Home Office has stated
"We have seen the considerable progress they have made in tackling online Child Sexual Exploitation."
No doubt it's become more lucrative since perverts can't get it for free any more - I imagine the staff at the HO are rubbing their hands with glee at the prospect of being able to drain fewer accounts of more money on the odd occasion when they have to throw one of their lambs to the wolves - makeing their stats look better.