Literally no requirement they add to the crown is going to filter out people who aren't interested in being genuinely helpful, and the only reward one should expect out of it is the opportunity to actually help those who are in need of it.

The only rework, then, that needs to be done to the mentor system is to change the icon to something not so prestigious, like the watering can idea that gets floated here now and again, and to establish a non-novice network global opt-in chat that can be the new stomping ground for all the garbage that usually gets put into there by people using them as social linkshells.