Do all votes count toward the showcase rating?
No, not all votes count toward the rating. Each user is allowed to vote one time for each showcase. Any subsquent votes from that user will only change the original vote, not add a new vote. Also, each computer is only allowed to vote only once per showcase. This means that multiple accounts from the same computer will not be able to vote on the same showcase. Note: Occasionally this check performed by the system will view a small home or office network as a single computer.