Voting on content is different from Charging content. Voting does not involve the use of SPN, and there are no subsequent SPN Rewards no matter how many upvotes a piece of content receives. To cast your vote on the quality of a post or comment, you can upvote or downvote the piece of content, which you can do by clicking on either the up or down arrow on the right-most button below the content. A number between the two arrows indicates the balance of votes in aggregate from fellow Sapien users who have voted on the post or comment.