Hmm. It’s not a perfect way of measuring source bias, and bias is only correlated with truthfulness as I think they themselves admit, but I applaud the spirit.
I worry that people will put too much stock in it’s assessment, and as far as I can tell propaganda posting is already pretty controlled, on .world specifically. Did you code this yourselves? Is there some way one of us could request to push to the source, like if I figure out some way it could be better? In particular, it would be good to add notes on the specific sources commenters have described as having issues not covered by MBFC.