It should encourage meaningful real-world engagements, activities, events, charity, business development. Everything about the app should facilitate real relationships.

Use AI to help arrange meetups, or propose group opportunities. Imagine having something like facebook groups where AI is there to help you actually hang out and do things. Schedule meetups, rekindle lost connections, find activities, develop relationships, develop new business ideas, activate civic engagements.

OP specified no addictive behaviors, I won't suggest ai using ;) I'd actually suggest a non ammitted ai network, just for humans, sometimes we'd need just to connect with real people instead of algorithms