Yes. First of because "walled garden" is just a metaphor for the type of system the App store represents and Second if you have "walls and fences" but with an o

Yes. First of because "walled garden" is just a metaphor for the type of system the App store represents and Second if you have "walls and fences" but with an open door where everyone can enter if they Pay 30% of their revenue then those walls are there for revenue generation and not for security.