tie-down

tie-down
 n.— «One very old direct sales principle is to get people to say yes to multiple little questions. This gets them agreeing with you and also gets them used to saying yes. Psychologically, they will then be more likely to say yes when you ask for the sale. One sales technique for achieving that is the tie-down.» —“n Internet Marketing Secret: Using Tie Downs to Increase Sales” by Mike Adams Self SEO July 2, 2005. (source: Double-Tongued Dictionary)