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Great comment @dray91eu.
For this line "whale may rarely upvote a content with less than a dollar on it...", I would say it is rather the opposite. A whale, or anyone for that part acting as a curator, will try to find good content, and the more undervalued the post is, the more likely they will vote on it. 
So don't think it is impossible to catch a vote from a whale. What you can do is to try to make your post more visible. Best way to do that is to promote yourself by writing valuable comments on other related posts.