There's no greater source of professional resentment than suffering under a manager who's incompetent and a narcissist (my summary of his blurb). After 18 years at Google he probably feels safe burning that bridge.
I second this as well. If you're really the type who's talented and motivated, then don't waste that talent and motivation on making someone else richer. Start your own thing. If you don't know how, then learn how. And if you're too afraid to do it, then spend your spare time on a hobby. Become a proficient pianist, learn to cook, run a marathon, anything other than making someone else richer.
I think this is a bad development. The allure of getting paid for something you do for free can be too great. This may lead to OSS devs, especially those who do the work for free now, expecting extrinsic reward for their work. Extrinsic reward for work that once provided intrinsic reward can lead to cessation of that work, if the external reward lessens or goes away. A new type of dev may emerge from this who won't have the same values as the ones who do it free of charge.
I can see this support feature changing things, but it won't in the way you suspect it will.