I am super confused about the concept. I pay "someone", of my own choosing, and I get access to...what, exactly? "everything"? What is that? What incentive do t

I am super confused about the concept. I pay "someone", of my own choosing, and I get access to...what, exactly? "everything"? What is that? What incentive do the developers that I'm not paying have to give me something? > Pay to download or for other services: Not worth it; users can find the software somewhere else and they don't need your other services. I also reject this premise. My evidence being the trillions of dollars spent annually on software and other services.