On the map and in the filters above is essentially raw data: Every company that can ship wine directly to customers in the state, as registered with the Pennsylvania Liquor Control Board.
It's a novel concept in the commonwealth. It's only been legal since August 2016. The rules are a little weird.
The way the PLCB presents this data is, shall we say, unhelpful. It's just a PDF, alphabetical by company name. That's better than what they used to have, but still there's no way to sort it or make sense of it or, really, dig into it at all.