Hmm. If I remember correctly, TAQ data does not include NBBO when the BBO comes from the same exchange.
To Polygon defense however, there are a lot of quotes from local exchanges as well. Consolidating and pick which quotes to show up as BBO are complicated (Not as simple as choosing best...
He has a CFA and work as an investment firm. He's smarter than most people here for sure. Also I think he stoped the daily portfolio updates now. He probably started selling.