Hottest take in the history of mankind. I think my screen is about to melt. GNU/Linux is not free, it requires a computer to run. Free beer is not free, drinking it requires you to pay for your upkeep to remain alive to be able to drink it.
GNU/Linux requires basically the same hardware as the usual alternative (Windows). If you switch from hosted GPT-3 to selfhosted GPT-J you start needing to get and manage all the hardware, which might go underutilized most of the time depending on what your demand looks like, and which requires lots of software optimizations to use maximally effectively. You can use hosted GPT-J, though, a few companies offer that.
The comment to which you replied is making a useful point actually. Self hosting is not free in the relevant sense when comparing cost vs a third party API.