I set my threshold or minimal voting limit to 70% Voting Power total but it stopped at 90% when I voted at 2.14% Vote Weight. But if I was voting at a higher weight, then it continues to vote as my voting power went below 90%.
It might be that it will not upvote lower weighted votes under 90% power, so far that looks to be the case. But I have picked to vote for a few accounts at 100% weight which means my voting power could drop a lot if I'm voting a lot or too much.
I may change my threshold to 80% or 90% in the future. For now, my limit is set at 70% and I will see how that works out.