Well, I had never come across it before.
I have noticed a subtle change in these calls over the last few years. For many years DH was targetted by boiler room phone calls trying to sell him shares in dud companies plus other random callers. I rarely if ever got scam calls and if I picked up the phone if the scammer wanted to speak to DH, I was not considered an adequate substitute. The boilere room calls stopped after a big criminal case a couple of years ago when lots of people went to prison.
Now, all the scammers ask for me. To be fair I get very few scam calls, maybe only one a month, presumably the scammers think a woman is a softer touch than a man.