Sam Decker touches on remarkability in a recent entry on his Decker Marketing blog. If you are too "pushy" in your sales and marketing, he writes, you fail to create intrigue. Intrigue about your company or product tends to stimulate interest and generate word of mouth.
It struck me that the problems with offering discounts relate to intrigue, or lack thereof. When you offer discounts, you may initially generate some word of mouth. Unfortunately, you also undermine any intrigue your product may have, because offering discounts (or at least publicizing them) is being "pushy".