> It is a regular occurrence to hear about open source developers selling their browser extensions, only for their users to be exploited later on by the new owners. ... We are witnessing the failure of browser vendors to recognize the value of our labor and the important role it plays in a healthy browser ecosystem. So this is an interesting philosophical question - the market value of the extension is the value of "…
Labor itself has no intrinsic value at all. You don’t have to think very hard to come up with a list of things that would be laborious but not valuable. Economically speaking, the value of any product can only ever be what people are willing to pay for it. If your users aren’t willing to pay for your product in one way or another, then your only option is to sell access to your users, in one way or another.