I'm willing to bet anything that the line at 20sat/b is Viabtc and they tx screwing the minimum!
With the 30sat/b barrier not being broken once by any other pool that's for sure just them distorting the graphs.
See look, FeeBuddy is clearly smiling in this picture:
$468.16 to inscribe
Now imagine the outrage here is somebody would be doing this, if fees go any lower I'm wondering what troll level this move would be ranked ...