Just thinking out loud: Recent observation suggests mini-neptunes are the most common planet-type in our galaxy. That means it would make sense for them to show up a lot on our random planetary system tool. So, if you were wondering, that's why I made a sub-neptune redirect page, and put an "rps_badplanet" tag on. Doubling their frequency in the tool is a slight nod towards increased realism.
Sub Neptune / Discussion
This is the discussion related to the wiki page Sub Neptune.