I’ve noticed a significant change in my Facebook feed recently. It’s almost all content creator content now, which I’m taking as a sign that my network is no longer posting there.

True.

I’m not anti-Fediverse here, but tbf it would be ridiculously easy for data harvesting companies to plug into the API and fingerprint individual users from their activity. Admittedly, I don’t see how browser based fingerprinting could be done without hosting an instance.

To be fair, that’s true of most social media, including Reddit.