The scammers outsourced their scam.
The most interesting bit about this scam is that it appears that the scammers have outsourced their lead collection to other call centres. I don't think the people doing the initial part of the call know they are scamming others. They get to a point in their script and then the call gets transferred to someone else. If you hang up on them , they will call back and there are some handy scripts around the net so you can answer the questions in a reasonable way to waste their time if your inclined that way. These calls seem to start with "We have detected a virus on your computer... can you turn on your computer?" It is not hard to keep these guys on the phone for at least a half hour before you get transferred to the real scammers who get very upset once they figure out you know their game.