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Ah, that's unfortunate! Would this be something that could be changed/"fixed" at one point? Because I believe we would solve a very big part of this problem if we were able to tell exactly for many transactions a user has left.

Generally, you can see this if you go to https://steemd.com/@[your username]
Right now it's flaky but I have always relied on it to keep tabs on my bandwidth and VP

Ah, that's good to know. Maybe it would be possible to display this for those who run out of bandwidth in the Steemit UI, so they know what's wrong.