I’ve never taken playing your best on every game you play as the point in that paragraph. That paragraph is 100% about collusion between two players, which typically involves one of those players not playing their best for the benefit of another player.
Players openly don’t try their best all the time. There was a KME vs. ZAC match at Expo a couple of years back where KME literally turned off Star Trek after two balls because he was down ~300mil and didn’t feel like putting in the effort to try and grind his way back into that game.
While it’s often hard to judge intent, it’s pretty clear going and powering off a game without playing your third ball that Keith was not - .“making the best possible competitive effort on each and every game played”.
Should Keith have been DQ’d because of that?
(Zach returned the favor on Game of Thrones in the same match after Keith put up some insane multi-billions score and Zach chose to save his energy for game #3)