Moon karts is a game of races but it is bigger than that as you have a complete system of investing and rewarding and also playing and you feel that you are in real life as you have a kart and its part and also some fuel to be claimed so you are not in a race and leave it but outside there are a complete ecosystem that is amazing.
I have claimed my fuel today to be ready for new races and this is what I have to do that to claim fuel everyday even if I don't have time to play because it is like a resource you could transfer it as a gift to someone or even sell it.
So Staking Cards and Some Script is not just locking these and leaving it but in Auto Vault which act like a machine that generate fuel and like in real life, this fuel has a value to be owned like cards and you are free to transfer it or to play it.
For me I didn't try to transfer my fuel as I use it to play multiplayer mode to get also rewards when I play as if I hadn't enough fuel I didn't get 100% of my rewards that Claimed in the in the race and this is like colony and orbitals that I have find in the track of moon karts.
I have a mission today in moon karts as my rank yesterday was 24 so I need to play more to get more rewards and to be able to rise in the rank as every race at least I got second position and so I got 15 points that may be 3 races make me jump 3 or more ranks up and as season when started it didn't last long and ends so I have to hurry up and play more.