RC has a similar profile to me, in the sense that he publishes daily but spends all day reading, so he can engage more. When he last revealed his stats, his earnings and mine were pretty similar, but that was before medium friend, and it always depended upon me having one story do well. If I had a month when no single story stood out, my earnings fell below his earnings.
James B does a lot of engagement and does well from it. Leonard is killing it on his return from illness. I don't know how their earnings compare to someone like me, who tries but doesn't do as good a job of engagement. It was interesting to see RC's though. I have asked him before if I should quit the day job and do what he does! He says, probably not - the earnings aren't that good! LOL