Mrs. Theknow and I have gotten no less than a call per day since we moved in Dec. 23rd. last year.
Other calls are for home security. I did sign up and got a free system installed from a reputable company. Then cancelled the service. Don't think too many crooks are going to stick around listening to the loud horn noise until the cops show up.
Same here with credit cards. They offer you 0% for 6 months. I use it to pay off my existing card and surely another offer the same will come in 6 months time.