I expect the only viable solution left is to go around the meter using an aggregator like Tesla Autobidder. A large entity consolidates many home batteries as one "virtual" battery, handles the grid futures prediction and dispatching for a cut, and re-distributes a majority of revenue back to the battery owners.

This effectively uses the existing behind-the-meter grid market to make an end-run around current perverse (non-local, non-instantaneous) end-customer pricing schemes.