Maybe I don't understand something, but if Ashley is going to pick 5 most upvoted ideas, why does it matter how many people voted on them? Limited or unlimited votes - in both cases some ideas will get more votes than others, so just pick 5 from the top!
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It's a moot point because it's not happening, but... ^this^.
I can't think of any reason why unlimited votes would result in a less accurate view of the consensus of the entire user base on which ideas are best. More votes will still accrue on the issues that are the most appealing to the most users. It will just make engagement with the platform easier. It's a shame there's no way to limit the number of ideas each user can create so we could at least try unlimited voting. Ah well, such is life I guess.
My hope is that the six month reset will result in more engagement by Scirra on the top ideas, which should still be a nice improvement over the current situation. So I'm excited to see how this goes, despite my grumbles.