A quote from JangoSteve that really resonates with me: "There are ways your users tell you your product is too cheap, without actually having to tell you. One good indicator is when you have a lot of people signing up, and then not using it, in which case your product is so underpriced that it attracts indifference."

Our product attracts a lot of indifference. This is good in the short-term (free money), but ultimately we don't get to provide the value we want to provide, garner feedback from their regular usage, and they also eventually cancel and not even switch to a competitor.

And another one:

http://news.ycombinator.com/item?id=1781156