Maybe they have a hidden agenda. Something as simple as confirming your phone is connected and then they sell phone lists. Phone carriers/companies can stop thus. Every cell call costs you. It's getting worse. 10 a day each on three different phones. There 30 calls. Wow.
Called my cell & blocked the number once read it was a scam but the bad thing is this number is private, not given out & on the go not call registry. Stop calling!!!