I played the event for days on end, spent over 10,000 cards lottery coins and could not win any "La Jinn". It is for these and other disappointments that I am leaving the game after 9 months playing.
I know what you mean, yesterday, I did the round 9 almost all (except Pegasus) to have the 3 copies of the toon barrel dragon (like 15.000 coins), I can't even imagine how much rounds you need to have just one card of this one, it's really disappointing and I'm also thinking in leaving, it's completely necessary that they rise the chance to get cards, specially in this kind of events.