Your statement implies that you were individually targeted, stopped and turned back at the border because of your work as an escort. So why not share the story of exactly what happened to you?
This thread and the other one on the same topic include a lot of unsubstantiated claims about ICE identifying, targeting and turning back individual escorts at the border. I do believe that some escorts have been turned back, but I think it's rare. And when it does happen I don't think it's because of some sophisticated, high-tech, covert operation by ICE.
I was individually targeted, as was my duo partner, as was six other friends of mine, including several independent providers in Montréal, and I know of about five other from different cities who got caught last year as well.
Since my mom works in customs, she explained how it works to me, and they very much do have a specific department dedicated to finding sex workers or other unwanted people trying to cross the border.
They were waiting for myself and my duo partner as soon as we got up to customs, they didn't ask any questions just sent us straight to secondary. They take your phone and any other electronics away, get your luggage and make you wait uncomfortably for awhile. Finally they ask you questions, my friend and I made the decision to admit to being workers, since we know if you deny, they will go through your phone and laptop, and detain you for longer, and we wanted to keep our clients info safe. From what I gathered, they either flagged us from our last trip to the US, or from travelling too often for leisure.
They search your luggage, finger print you, photograph you, make you sign documents as an "alien", etc etc.
Another provider from Toronto was caught because they had an old Eros ad with a tattoo showing, and they matched her tattoo up. They usually will have your website and other social media up and waiting when you enter and have already researched you, because they want to question you and catch you in a lie. They already know the answers they need to know before you arrive.
It's not some covert operation, it's literally just a department whose job is to go through flight lists and cross reference names that get flagged for a variety of reasons. Once your name gets flagged that person will start researching you and then from there decide if you're to go into secondary questioning or not.