Even economically mediated third places are being phased out in some respects. When I was a teen we often hung out at a local McDonalds. Super cheap food, free refills, as long as you didn't cause trouble you could stay for awhile. I went back there somewhat recently and I was shocked at the difference. It's been remodeled to have less seating, no refills, most of the lobby/counter area is touchscreens, and of course prices are way, way up compared to when I was a teen (which was not THAT long ago). It felt sterile inside, it was clear they didn't want you hanging out for long. Not a teen in sight.