That is one thing I was thinking about. That if I really want to return anywhere close to the amount you upvoted my comments for in the past few weeks/months, then I would need to buy quite a few Steem.
You're also right about that your upvote is more valuable then most dolphins, orcas and whales do.
And best thing might be that you said something about my behavior. Since I always believed that is what is meant to happen on Steemit.