What do you think about the relationship (implicit or explicit) between creators of free-to-use web products and their users?
Agree with your general sentiment that there is still bi-directional commitment in "free" products but would say services do need to segment their users. Especially as products grow & mature, they by nature will evolve and disappoint (rationally or irrationally) some groups of users.
At Second Life I was concerned that our early users weren't always showing us the way towards a mass market. And it became worse once they started paying because it created a direct financial incentive and dependency to keep them happy.