Until today I receive a 100% upvote daily, no matter at what time I post and no matter the number of articles using the tag (at least one). Right?
Actually, this is not right either. It was the case before Precious 2.0 but not now. Maybe you have not noticed but the other day you got a 98% vote because it hadn't quite been a full day since the vote before that.
You are usually very diligent and post at almost the same time every day so the vote accrual change has not really effected you very much so that's why you might not have noticed.