Yeah, let me just go buy a couple 5090's to slap together to run it....
It's "free" now because users are training it. Once it's trained it doesn't matter if the underlying code is open source or not. The companies who own the hardware will start charging for it.
If you want your own you'll need a massive upfront cost, expensive training that would still take months, and pay for the energy use.
Just because its free on a website now doesn't mean it'll always be free