I also don’t have a clear answer but I can transport a few pieces of information that I have picked up so far.
If you exit one satellite we would still apply the threshold. Basically, we will always apply the threshold as long as you still can reach the threshold in the following month by receiving additional payouts.
This also applies on a bigger scale. You can run 2 nodes and exit one entirely. There is still a second node that will receive additional payouts. We would apply the threshold even in that situation when one storage node did a complete graceful exit.
We also noticed that this situation is not necessarily a problem with graceful exit. You could also take your node offline and get disqualified. Same deal. If there is a second node we will apply the threshold.
So what if you have no other nodes to get any payout in the following month? In that situation, we want to send out the remaining payout even if it is below the threshold. Currently, that part is not implemented and that also means alongside the implementation the rules around it might change.
zkSync should work for sure. Even on a node that has finished graceful exit on all satellites you can still opt into zkSync and receive your payout that way. Please read the warning around zkSync in the changelog before you do so.