indeed, and the point of GR is to get a good idea of where people stand relative to each other, so if you keep playing noobs they will only be contributing a small amount to the pot, but if you keep beating them then eventually you will be contributing more than 100 GR points to the pot and if you lose or draw you will get a pretty big net loss.
(say 1 player with 1750 GR points, and 6 players on their first game with 100 - they each put 5.7

into the pot, and if you solo you make a net gain of ~34

, but if you achieve a 3-way draw you lose the 100

you put in, and split the 134 equally three ways with the other noobs, giving you a net loss of 55

(while they each make a net gain of 38

)