The list is long. Another recent example was Sparrow. I broke my rule about buying/licensing software from small companies (unless I got the source) with Sparrow. I didn't just buy 1 copy, I (we) brought 15 (for the office). And of course, I got burned. Again.
It will not happen again. Period. Unless you tell me up front your plans - what you plan to do for me, the user, when/if you fail or sell.