I know an independent SSPX-aligned priest who NEVER STOPPED having public Mass every day and on Sundays. In fact, he had overflow crowds on Sundays from the Motu folks who showed up because their Motu Mass was shut down. He also got some from nearby SSPX chapels and the CMRI chapel. I'm just very surprised that no one ratted him out. His parking lot was overflowing into a nearby shopping center.