There's a huge difference between what you're talking about, sensible investing and the garbage I'm talking about. The BS I'm referring to are the clickbait titles like "How I Make $20K a Week in only 4 hours," or whatever, which offer no advice and really tell you nothing at all.
I'm not sure "most people" in western countries can invest $150 a month. Maybe they can, I've never taken a poll, so I don't have the numbers, as it were. I know, for example, where I live, a minimum wage worker, or someone hovering just above that certainly wouldn't have that to investbecause after rent, utilities, and food there's nothing left. That being said, I've been doing just as you said for years.