Yes, you described what you see as the difference between data and "data" clearly. And I described what I see as the implications clearly. If anybody's still reading the thread, they can make their own conclusions.
It’s less of an agreement and more of a protocol.
Threads Supplemental Privacy Policy begs to differ that there's not an agreement here.
My point is that defederating from meta doesn’t stop meta from tracking you online.
I never claimed it did. It eliminates one path of consensually sharing data (or "data", in your terms) with Meta.
In terms of your list, my perspective is that a server that federates with Threads is part of Meta's ecosystem -- #1 in your list. You don't seem to see it that way, and that's what we're not going to convince each other about.
Meta is a company whose business model depends on exploiting the data it gathers, and its privacy policies are carefully written to give it as much flexibility as possible. It's true that if you're on an instance that federates with Threads you're assuming that risk. If you compare their language to a policy that's written with a goal of privacy -- like eu.social's the differences are clear.
OK, then, speak for yourself: do you see instances that federeate with Threads as being part of Meta's ecosystem?