Regarding Marketplace to " SELL " Velo packages:
Let me be that guy
I know some Velo developers must be very hyped for having a market like this but from my experience I do not think someone will pay for a code package. I mean Velo is Nodejs and JavaScript, think about it. Stackoverflow and the internet is filled with every possible solution you will need for the programming languages.
If Wix wants to experiment, then instead of building a marketplace for this, try putting a paywall in some Velo video tutorials or even normal Velo examples, see how much conversion you will get i.e. how many of them actually pick up their wallet to pay to see that example/video.
As far as non-coding DIY Wix users go, even if they pay for the package, how are they supposed to know how to use it. Not sure this marketplace will have a high conversion rate but that’s just me.
Regarding Marketplace (Non-monetary):
Yes it would be a good idea. Perhaps have another incentive instead of money, like rating system to rate package creators, have analytics of number of package downloads. Gamify it, maybe let people award badges and stuff to creators. This will give developers the purpose to create packages and at the same time we can pay it forward (I mean everything I learned about coding is from the internet so helping out people like me who want to learn would give me the utmost satisfaction)
My conclusion: create a marketplace but let it be open source, don’t put monetary incentive but at the same time introduce a gamification system