25 reasons users stop using your product: An analysis of customer lifecycle

I'd like to point out that these reasons also apply to things other than products. In particular, going through that list it struck me that those points covered pretty most of the reasons I had for leaving online communities of one sort or the other. I'm not referring to just Web 2.0 environments like Digg or Reddit but rather to just about any online group of 3 or more people. From forums to mailing lists, these reasons all play a role.

interesting, although a list of "25 reasons users start paying for your product" would have been more useful. not sure about the % of hackers here who have recurring revenues from customers