Good points. I'll edit the post to clarify these details.

yes, this is a 24 hour running average of the 10% of inflation that goes to the DHF.

total_daily_commitment is daily supported from the wallet view here.
highest_raw_vote_total would currently be the VSC proposal with 59M HP

So at 20 cent hive, there is about $1750 a day that gets put into the DHF from inflation. So my votes would be weighted at ~45% right now. If the total Hive Power was 118M (2x the highest proposals unweighted votes) it would never fall below 50%.

If the price went to 40 cents, my vote weight would be back to full power. And I could also unvote proposals that wouldn't loose support if unvoted them.