If any part of the code is not visible to your users/customers, it's not as open as open source. Your solution sounds, in fact, less open than "Commons Clause"

If any part of the code is not visible to your users/customers, it's not as open as open source. Your solution sounds, in fact, less open than "Commons Clause" type products which fail open source definitions because they restrict commercial usage without a license, but all of the software is still visible.