The win rate quoted was just an example. Nordeus should have all the data to decide on which rate would place them best to put players into different tiers where they could sell the most offer players.
It can be only positive for the game when more managers become active and also look to win more matches to drive up the competitions too (and it is highly likely that most managers would then watch more ads to generate more revenue for Nordeus). Events would become fairer and balanced as well. Win-win for all.