10 points
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The TL;DR is “so it doesn’t become XMPP” - if a big player from the corporate internet world achieves significant sway over the Fediverse, that gives them a position of power to steer the platform itself, eventually letting them undermine the whole “open-source” and “decentralised” part of it entirely before taking their chunk of the federation private, effectively kneecapping the remaining communities outside the walled garden.
If you’ve ever heard “the three Es” - Embrace, Extend, Extinguish, best known from the Microsoft antitrust days - that’s what we’re worried about happening here.