How does overwolf grab game data?

Actually someone has actually asked this before How does Overwolf grab the game data?
And someone sent them this link : How Overwolf is getting the real time data on the game events?
But its a dead link right now.

Hi @Baquant ,

Thanks for updating us about the broken link. Anyway, the “How” is our “Magic,” which is Overwolf’s IP, so I can’t really elaborate. I can say, though, that we’re speaking directly with game developers, and we’re aligned with them

So it is memory reading.