Rigging card unlocking speed
It is so obvious that the developer is rigging card unlocking speed to pressure players to P2W. Evidence: 1. You see so many higher level players drop 500 to 1000 points which you then hv to play against, can that be persistent random bad luck streak for 1000 pt drop, or they simply forgot how to play? 2. You can try an avg mana deck of <= 4 and find often players with much higher avg mana decks unlock much much faster. Now, don't argue that is due to randomness unless u r somehow IQ challenged. Try it urself. The result will be enlightening. Conclusion: despicable developer practice. I will spend much more on this game if I see transparent practice. Such developer does not deserve patronage.