I like your optimism, but Meta is a relentless cancer and FOSS is its enemy. It won’t sit idly by while ideas of ad-free alternatives grow in its users minds. Nothing good can come from Meta’s mingling with non-profit competition.
The only silver lining is how incompetent these corporations have been lately. Fingers crossed, they’ll fuck up whatever nefarious shit they have planned, and the fediverse can carry on in some state when they try to pull the rug - at the very least for those who value its ideals over user count, but hopefully also still as a viable and active alternative.
Here’s an accessible summary of a few historical examples of why people don’t want corporations adopting their open source platforms: https://ploum.net/2023-06-23-how-to-kill-decentralised-networks.html