I got a couple of calls from an unrecognized number.  No message was left (either time) which raises a red flag.  (So I can't say if it's reducing my credit card rate, free cruise, etc.)  As usual, I did not answer, and I looked up the number here.  (800Notes is my go-to.)  This is the first report, so maybe a cautionary tale for anyone else.  I will be adding this number to my "Telemarketer" contact, which has a silent ringtone and is blocked.  (I won't be bothered by this number again.)  An Unrecognized Number + No Message = Scamarketer.

"Honest Business men don't conceal their place of business." - Arthur Conan Doyle, The Adventure of the Three Gables