I've always found gauge to be especially odd, because the number gets smaller as you go bigger, so at one point you can't go any further even though you can go fatter.
Apparently they only take into account up until the 1st of December or something because I've been playing a lot more than what they've given me, most of which in the last two or three weeks.
In the Netherlands we have Marktplaats.nl and Vinted is pretty big here as well.