A pro-Domme I'm friends with was on there last year and lost quite a bit of money she'd paid for advertising. She was mad.
More recently, my ex was using the site to look for prostitutes.
Otherwise, I don't know much about it besides what I've read in recent news. I did read an article recently that said, that the site would run algorithms to remove certain key words from ads, such as "amber alert" or "cheerleader" (code for trafficked minors) and the article seemed to be saying that the programming would clean up ads of that language but let the ad go on and be posted, then.
My thinking was that if this was the case, then the owner of the site, the person(s) responsible, should absolutely be facing charges, because they were willfully and deliberately helping child traffickers avoid detection and continue to operate.
If, as many sex workers seem to be arguing, the site's ownership were actively engaged in helping the FBI track down and bust traffickers, by using the advertising platform as a sort of trap, and to provide evidence...then I feel the owners should be celebrated, not prosecuted.
If they were neutral in it, neither helping the bad guys, nor helping the authorities catch them...then I think perhaps steep fines, civil action, no more website, whatever.
But I think the bigger worry about FOSTA and SESTA is with regard to censorship and closure of other websites, not especially Backpage. Microsoft has changed some of their policies regarding "language" and "content" on X-Box Live for instance, and Outlook...what exactly does that mean? What about social media? What about porn sites? And will Fetlife survive and remain accessible to Americans even with the changes that they are implementing, long-term?
Stuff like that.