Years ago, we use to take advantage of those three day four night freebees both with our rv and also with those time share companies. An hour and a half of siting and listening was a small price to pay. Don't do it anymore.
We typically don't even answer our home phone due to all the robo calls. We put our number on the don't call list, but it seems that doesn't do much good. We are even contemplating getting rid of our home (hard line) phone.
Waiting for the robo calls to hit our cell phones....
Ron
ps... never heard them referred to as a "cold call"!