Yes because as I understand it the custom domain is basically just a pointer. Everything still goes through the bsky servers and you can be deplatformed there at the whim of an admin/mod (On Mastodon if you don’t run your own instance that can still happen, but you can instance hop. If you run your own then other instances can block your instance but it’s not the whole network all at once)
Yeah, this seems to assume that the set of people able and willing to make contributions overlaps the set interested in simply asking questions, and I can’t imagine that working. You know the rule that in any community 90% just lurk, 9% comment, and maybe 1% actually contribute. For everyone but the 1%, I foresee querying until they hit the limit, then they leave.
This might be somewhat mitigated by it being a very technical system to begin with, so even being interested in queries is a barrier.