That's quite true about the "advertisement education" available with Pop and Modern.
When first getting into photography I would read every page of every issue, and after each page would think, "I didn't know that."
Later I attended Brooks Institute of Photographic Arts and Sciences in Santa Barbara, CA. Did very well there academically that first semester in no small part because of the foundation built by those magazines' articles, columnists and their adverts.
Panasonic GX1, 20mm 1.7
Fuji XE-2, X Pro 2,
w/ 18-55 Fuji
16mm 1.4, 35 1.4, 56mm 1.2 Fuji
Nikon D800e with 6 primes and
a zoomer (70-200 f4)
Mamiya 7ll with 50, 80 and 150 mm lenses---The best camera I've ever owned.