Yea, i'm not sure how much benefit of doubt we should be handing Mark Zuck of all people. There's few people in the world who make their intentions more clear than him. Not that i'm trying to paint him as evil, i'm not and i don't think he is, but i also see no reason to expect self-run instances to offer an olive branch to him.
We should be vary paranoid about Embrace Extend Extinguish in these communities.
What's the difference to users of the two platforms, in your eyes? I'm not familiar with the workflows of either Instagram nor DA