"significant exposure" is, always has, and always will be a draw to teens and 20-somethings. It loses its luster as we move into our 30s and has zero draw in th

"significant exposure" is, always has, and always will be a draw to teens and 20-somethings. It loses its luster as we move into our 30s and has zero draw in the 40s and later (at least in professional circles). But, it's like the line from the movie "Dazed and Confused": "You know what I like about high school girls? I keep getting older but they stay the same age." There's always new blood out there willing to exchange blood, sweat, and tears for "significant exposure". What sites like CodeAcademy, et al have to worry about is maintaining the quality of training from one batch of "not burned out yet" trainers to the next. Because if you aren't paying people, "significant exposure" only has a short life span.