Old Man Peng is widely known because the industry has become more competitive and older men are harder to fool, so more and more people have started taking apprentices and selling tutorials.

This falls under “color-powder” monetization within the gray industry, which is no different from fraud; those involved are mostly young people, and there are also some middle-aged women.
Getting strangers to pay directly is much harder than asking for a cup of milk tea or lunch, but the old men don’t know that those payment links can actually be handled with software.
By the way, here “old men” refers to middle-aged men over 30.