One way is making raytracing shaders for older games. I recall one korean dude whose patreon was raking in ~50k dollars a month, several of his releases/posts were about adding raytracing to Fallout 4
Not that I'm opposed. Currently reskilling myself from bored accountant to hopefully some sort of IT wizard. Just learning everything I can get my hands on and doing projects like building / maintaining a home server, building a PC, switched to Linux last year, and coding some small projects in Python.
I just feel like I'm learning such basic things and won't be able to actually make money with any of this for years. It's frustrating lol