I'll confirm it's a pyramid scheme.

no, they don't give a crap about the FCC or the DNCL.  in fact, those charges will probably never be pursued in the face of who knows how many counts of grand theft, fraud, and whatever the IRS and Postal Service coppers can add on.

so really, it's time you stop being surprised and move on. the best thing to do, is just not answer. if seeing that call really bugs you, look into call blocking (physical residential hardlines, software for cells. for businesses, talk with your it support.)