The idea is nice, but like secretmapper said as well, it's very likely to become a spam risk if you ask me... :/
And frankly... the idea of "the more people gain in points, the more they would have to say" is something I wouldn't like to see implemented...
In my book, every user of AG is equal!
If someone who has (let's use the current AP system for this example) 10,000 AP has more to say than a person with 200 AP... where's the benefit of this?!
A person with 10,000 AP might just as well dislike a certain game compared to that 200 AP user and there's nothing to gain when he would have more say in putting his vote on the table... *aha* ...or am I missing something?
I just don't see any use with this... 0_o