I suggest that you give an option to choose the modules that go with Sprocket Rocket theme on the marketplace. Selection starts with your default or recommended set. Sprocket Rocket users then get to choose their modules. A 1 or 2 module minimum limit per category (hero, column, card, bling, etc) will be enforced.
This is currently not possible with the marketplace
If it is not possible in the marketplace perhaps in coordination with sprocketrocket.co managed via your portal?
Don’t you think there are way too many testionmial modules?