Oh wow youre very correct here, we are totally forgetting how many SP Whales don't even use their upvote... many of them actually dont even use nearly a fraction of their vote power.... Just like witness votes which are basically only being voted on by a minority of steempower stake holders and its very interesting how many large stale holders dont vote for witness and how many of them don't even care to earn off their SP, many are just wealthy BTC whales with much more BTC than STeem, they all collectively buy more steem during the bull runs, theyre the ones buying up more stake with their extra bitcoin. SO anyway I do see this as an important point, many users who actually have a large stake don't even use their SP to earn off of it!