The difference is in the apparent available resources. You cant get to "professional" without the time and money, and NPM post acquisition, presumably, has more of both. Granted, NPM probably doesn't have a revenue model to speak of, which means Microsoft is probably not paying it much attention.
For those who have forgotten, Microsoft buying npm was basically a community service given npm inc was on the brink of collapsing
https://www.businessinsider.com/npm-ceo-bryan-bogensberger-r...
https://www.businessinsider.com/npm-cofounder-laurie-voss-re...
The difference is in the apparent available resources. You cant get to "professional" without the time and money, and NPM post acquisition, presumably, has more of both. Granted, NPM probably doesn't have a revenue model to speak of, which means Microsoft is probably not paying it much attention.