it should be like you set to to 40 and see it 20 times less often while setting to 60% would be 20% more often. I mean you still want to take into account maybe other things you filter or select like recent or active or such. basically the views we already have but then it will push down or pull up ones you rated but 0 being never show. honestly 100% is going to be just put to the top relative to your view. I mean it should not push old posts from communities when you are looking at recent.