
They cannot back feed when there is no grid power, yes. But they cannot differ between power used inside the house or outside the house. They can and will definitely push power back out to the grid as long as they detect grid power from other sources.
Yeah the unspecified “issue” is probably that the blocklist was not a shadow ban but blatantly obvious. They probably only unblocked direct searches for these keywords. Wanna bet posts containing any of the listed keywords are still either removed from all other feeds or at least deranked in the great algoritm?