I wanted to propose the idea of setting up a contest with an imposed theme with prizes to be won.
The goal would be to create a Babylon.JS scene with instructions, for example, glTF file, number of Draw Call max, maximum project size, UI via html, etc…
Participants would provide a link to see their achievements and sources for participation.
What does not participate can see the achievements and learn from exploring the project’s source files.
I hope you find the idea interesting.