Does it provide net positive support to developers? Is that support worth the licensing and maintenance costs? Those would indeed benefit from a demo, but it's also hard to demo something whose value hinges on fine-tuning.
More likely, they'll need to sell low-risk, supported integrations that help an org stand up the project on their own system and evaluate its quality in situ. It's a whole different model than retail SaaS services like Copilot.
This is an exciting announcement for a product meant to fill a gaping hole. The orgs that need it will just have to see how well it works for them.
Juat reading the code shouldn't be illegal, and producing a short snippet based on the code but not identical shouldn't count as a "substantial portion", but IANAL...