This stroke in MARKETPLACE SUBMISSION GUIDELINES confused me:
“Additional content types such as code plugins will be accepted at a later date”
It’s about plugisn only?
Can we sell code based projects at this time? A’la starter kits?
No code. Blueprints only 
Why? And when we will able submis code projects?
I think they are missing a workflow for approving all the code. It is somewhat different from approving Blueprints I guess… More things that can go wrong.
How do you prevent malicious code etc?
Gumroad, Sellfy, Sendowl.
All are good options for selling digital assets. And sendowl doesn’t take a percentage of the sale.