Imagine if you walked into a new store and the greeter by the door immediately asked you for a list of your friends and their email addresses then followed you on social media and while you looked at the merchandise, the greeter tagged you in a photo of their weekly mailer so that all of your friends could see it. How would you feel about that?
Put yourself in the buyer position. What works for you as a buyer? Keep that question in your mind when you are promoting your own goods.