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There is a point where your account is just so small that your rewards would "round to zero".

I am glad to see you started blogging. You will get votes.

In addition to what dan said, the biggest rewards go to those that vote early but not not too early. There are a few posts that discuss the exactly mechanism, but the take away is that just because you vote on a post that makes it big doesn't mean that you will get a big cut. Even with my high SP I have voted late on some of the biggest payouts (>$10K) and still gotten almost nothing. Vote timing is critical.