It seems there was a bug near the end of the event when the server was laggy.
I was buying a daily pack of puddings (the 100 golds one), when an error message popped up saying hum ... something I don't remember xD, and once a log back I got the puddings but my amount of golds had not changed (200). It was just in the beginning of the laggy period, well off course I posted a ticket (better be safe than sorry).

But after the end of the laggy period some peoples were attacking bosses as if they had infinite amount of focus (some of them were in rank 600 before and end up rank 150 or so). Maybe they use a lot of money, but maybe in the laggy period everything that you bought wasn't deduced of your current amount of golds.