i dont really understand what the issue was, is it that bad that people was able to get 5 more chest for cheap? why would that even make a dent in the economy?
Cheap quest potions was the only way for newbie players who dont get a lot of sps, who cant climb really high in rankings, etc to feel rewarded somehow
What is hurting the economy, if you care about that, if the unavailability for new players to buy packs of cards and the imposibility to advance in the game without having to buy a 1000$ summoner.