I was perusing Dweep to seep up some of Steves ideas and suddenly noticed the "I don't want to buy" button when you are leaving the demo version. Clicking on that led me to a page with things that Steve (probably) saw as typical sale stoppers and corresponding answers to save the sale. I must say I was most impressed by the "You are Evil" and corresponding answer.

Has anyone else similar sale-savers and what are your experiences with them? What is the sales rate from a page like this (Dexteritys one ended in a "Buy!" link).