Practice isn't limited to just showing everyone your secret team strategies. I bet there are plenty of players in Berlin who would like more stage time to get used to their surroundings. Also, why would Riot in their right mind decide to cancel an opportunity to earn more money?

Exactly my point. If there aren't many opportunities for teams to practice then why wouldn't they take advantage of the ones given?

The teams most likely would want to play for practice alone.

Obviously Sentinels performance so far has been despicable, but is it possible that they would rather have G2 as competition rather than F4Q?