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Theres a bot called @booster where you can trade steemdollars for an upvote. The more steemdollars the higher the upvote. This bot is extremely powerful, at least for lower rep users like myself. But 1 vote can easily raise my reputation 1 or 2 full points which is kind of crazy.

reputation is logrithmic...the first few steps are fairly easy...the higher the harder..