Steam Page that talks how the system work and a
Youtube video by a Skyrim Mod Reviewer:
The short version: A modder (or an addon marker) can set a price for a(n) mod / addon for real money or set it to pay what the user (aka you) think it is fair for their hard work.
My thoughts on the matter:
On one paw: I can why people who make mods / addons would like this system. It is good to be paid for your hard work. I had even made some mods for Skyrim myself.
On the other paw: However, I do NOT like the idea over all for the simple fact, it will destroy the modding or very least put a limited on it. Some people will not get as many mods due to financial reasons --> less downloads --> means less people who are making mods --> over time it will kill the creative to only to a select few. The sad fact of life that most people are greedy, instead of willing to help their fellow gamer, they will try to make some money off of it. I do not like this new trend. It is not good for the
modding community over all. Don't get me wrong, I do understand why certian people might want this. After looking at the BIG picture. it is not a good move for the gaming community over all.