For now, maybe old generation of Legendary have reason to keep their ranks, but if we look at 10 years later, it will be ridiculous if 10 years after merit system born, they won't earn a single merit and still be a Legendary.
Why only demoted to Hero?
I suggest to have auto-demotion over time.
For example:
4 years after merit system's birthday, if a Legendary won't earn enough 500 merits, account will be demoted to Hero.
6 years after, if a Legendary won't earn enough 250 merits, account will be demoted to Senior Member.
8 years later, a Legendary won't earn enough 100 merits, account will be demoted to Full Member.
I've always said that merit decay should be introduced, maybe not that drastic cut and maybe just based on activity periods as it would be unfair for someone who has been off the board for 8 months to be next to those who have made 2000 bounty posts in that period.
That would make the legendary rank mean something again.
-1 airdrop merit per activity period. Simple, brutal for shitposters, and god for copper membership sales
.
Back to the trust requirement, although I wouldn't like to see such a requirement for the next rank level I also can't help asking my self, If you don't trade don't leave and receive feedback, why would you want a higher rank? This considering you have already earned 1000+ merits so you're already pretty well known and your opinion is respected even without a new badge.
But it's not going to happen anyway..