“A journey of a thousand miles begins with a single step.”
If they’re just starting this might be their moment to show off something they’re picking up as they go - don’t shit on that. And advertise? It’s a free/open code. It’s a show and tell, let them be proud. Maybe in a few year’s they’ll build the next open source, federated Spotify competitor. For now, let them bask in the glory of making something fun.