Thanks for following up. We looked at it when you first suggested it and held off, because the metric is easy to misread: it divides lifetime rewards by your own stake, so anyone curating on behalf of a group scores badly even though the rewards came from stake delegated to them. It also drifts upward on its own while an account is powering down. It still carries some signal, so we are adding it. It goes in the account info popover on profiles, next to vote value and RC, using the same formula other frontends use so the number matches what you see there.