There is no limit. You can vote once per post/comment. There is a % that your vote is worth. Without it what is to stop you for up voting every single post and comment that comes through and gaming the curation system. It'd amount to zero curation and tons of crap posts. You could post a 1 line post and get an up vote from all the people. You can vote as many times as you want. The weight of your vote decreases to prevent this problem. It is realistic and is not the thing people are complaining about, except a few outliers like yourself. I haven't actually heard many people complain about the % thing once they understand why it is there. If you want to get rid of it then you'd need to propose a solution that can replace it that would prevent gaming the system. It won't be pulled no matter how you dislike it without some viable alternative being in place.