My vote goes like this... If you can get points for something... then there should always be a choice/way for you to earn those points.... whatever the length of your POINT EARNING streak.
As for being able to retake a poll... well there have been a couple of times when I didn't realize that had already taken a poll.... and guess what.. My attitude/education/experience/whatever had impacted my new reality... and I had changed my answer.
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