I agree with the above poster -- I can see the logic behind giving out XP for individual votes. But not for using all your votes.
Effectively, all votes are not equal when this incentive is in place. Why? Because you have a higher incentive to use up your last vote then your non-last votes. Not only that, but last votes are a greater percentage than non-last votes for newer users -- thus giving newer users the most incentive to just rate up all the newest nodes in SoPW in order to get their quick XP fix.

The incentive to vote should remain equal each and every time a user votes.

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