This isn't a ruling, it was a hearing that will eventually lead to a ruling.

What this is about is that the FARs prohibit private pilots from flying passengers "for hire" but allow them to "share expenses." There are a number of tests to determine whether a private pilot who takes money from passengers is flying "for hire" or merely "sharing expenses" and one of them is the so-called "holding-out" rule: if you advertise your willingness to take passengers, then you are presumed to be flying for hire and you need (at least) a commercial license. Advertising on Flightshare is considered "holding out" by the FAA.

(I'm a private pilot.)