Two of the best paid for shags I've had have been with ladies that claimed to swing. Both now retired, but I had no reason to doubt them.
That said, I've had great shags with SP's that have said swinging isn't for them.....go figure?
I reckon some women like fucking, some don't. Those that love it are good fucks, you might have to pay them, but it's worth while. Some just fuck for cash and see it like any other job.