And it was first hosted at OpenDarwin — which was Apple-run and not available for arbitrary public hosting.
It was then hosted at OpenDarwin’s successor — Mac OS Forge. That was also Apple-run and not available for arbitrary project hosting.
MacPorts was an Apple-authored and ultimately Apple-supported project for ~15 years.
As for momentum, the project is still going strong 25 years later, so I’m not really sure what you’re referring to.
I am referring to a significant momentum. You know, like the momentum Brew has.