"Subsat summer" shows that the filters work. Here's a question for you: if the 1sat filter doesn't work, why is there a huge wall at the 1 sat mark? (This chart is for blocks 910047-911047 and is from x.com/mononautical) "No filters" would produce something like a normal distribution.

There is clearly something "special" about 1 sat per byte, as demonstrated conclusively by simple blockchain analysis. I think it is widely used in preference to the smaller values because the smaller values are *harder* to use, as you have to bypass the filters to use them.