Called my Business line in BC during lunch. No message left. I wonder if it is related to the calls from Ontario yesterday that hung up after I said hello (on two separate business lines about 5 minutes apart)
I was told that with the right setup, some robo callers can generate revenues by dialing numbers without selling anything. Has apparently to do with the way telephone companies charge each other for caller id services.
A more common abuse is to just check if a number is life and than sell a list to telemarketing outfits.