There are (an estimate) around 30-50 contemporary art galleries in my area, closer to 100 if you count Provincetown and towns up and down the Massachusetts coast. There are several hundred tourist-oriented, decorative, and general art galleries, and at least that many frame shop/galleries, galleries in inns/ clubs/ restaurants, consignment shops that take art, etc. That's a lot of brick and mortar galleries!
On FAA I see maybe 10-15 "galleries" for my area. When I dug into them a little bit most were just artists representing themselves (and themselves ONLY) - studios and not galleries.
I have seen galleries I might be interested in out in the Metro Boston area and just beyond. None of them - not one - is on FAA.
I've gotten more gallery interest from Craigslist, which is setting the bar pretty low.
Does that help to answer your question?