On first blush I agree, but after thinking about it for a few minutes I can see a scenario (actually, recently experience several) where once the interesting engineering problems have been solved and the major challenges overtaken, my interest in incremental growth and feature releases dwindle and I wouldn't mind turning the product over to a company interested in growing the product gracefully (so I can move on to the next challenge).

I would like to be "on retainer" though if in the future some compelling feature was needed or some great bug was to be addressed that proved challenging and/or interesting...