The world is changed - given the low cost of reverse engineering and implementation, it would be product suicide to openly call out a money making product. I don't expect too many actual >500$ moneymaking projects to be listed. Would love to be proven wrong.
I offer some absolutes in reply and would also love to be proven wrong. The cost of engineering and implementation has always been low. Passive income has always been a subtle lie. The money has always been in providing a well-supported service. No customer has ever cared about implementation details beyond what is outlined in the contracts they have with you and the nth-order effects of the contracts they are under…
With Opus and fable and sol at dozens of dollars for a month, i don't know how you can straight-faced say that. But you do you.