The games played in your Ingame Earnings tab? Im pretty sure thats actually the amount lf games thet youve won.
For you
15474(qi) x 0.545 (win rate) =8433
Your ingame earnings say total games played are 8503
For me its 18304 (qi) x 0.60(winrate) = 11074
And my ingame earnings say total games are 11248
So, answers are pretty far off but maybe it uses a different algorithum then what my barely passed highschool math brain could come up with, and i dont really see another possibility.