The way this was implemented was to award the multiplier to all accounts that had interacted with the reverse registrar. This had the unintended side effect that if a user owned an ENS name on account A, and configured it to resolve to account B, which used it as its primary name, account A would get tokens, and account B would get the multiplier. As B doesn't own any names, the multiplier has no effect and the end result is that some users got fewer tokens than they would have if they had used the same account for everything.