What could Mozilla do? Build cloud services attached to your Firefox account -- like Google and Apple have. Use their reputation for openness and privacy to attract a generation of users who are despondent over Big Tech.
What could Wikimedia do? Use public pressure and shame to rewrite those re-use deals. And also disintermediate -- get directly connected to users, with chatbots, search, and voice assistants of their own.
Or maybe even wilder things. I don't know everything; I'm just some guy.