You can also optionally share your compute with others in order to gain credits they can use in the future. One of the many use cases would be if you only have 1 computer and you want to use open weight models while you work but running that model would slow down the pc, so you could instead earn credits by sharing compute when you aren't working then redeem those credits during the day. Also gives people a way to access models that they otherwise couldn't afford by saving up those credits.