as a minnow, yes, our upvotes' value are small... (in regards to the value of sbd) but... to upvote as a minnow is not just to add .001 sbd to steemians earnings... more than that, it also builds "engangement" or "trust" ...
knowing that a minnow upvoted your post, even in small value, it builds friendship...
when someone upvote my post, I click their usernames and read also their posts.. and from their, I create strong binds... a bind that everyone should build in order for steemit to grow and stay strong...