My advice would be to have two versions:

- Paid, which supports private designs.

- Free, where every design is open-licensed and discoverable.

There are approximately zero companies which will want their IP open. On the other hand, this makes this available to approximately 100% of the university and hobbyist market.

Don't cripple the free version in any way beyond that.

The one lesson I learned watching CAD and other professional markets for decades: You want your tool used in university classes. Heck, if there weren't conflicts-of-interest, it'd be worth paying universities to adopt your tool.

Hobbyists are less important (although there have been many examples of hobbyist projects turning into major companies).