It is a really interesting game with a lot of neat aspects that are still in development but calling it a 'ponzi' is uncalled for and just untrue.
I down-voted your comment to show my disagreement with your opinion. My opinion is based on my experiences with the gameplay, the cards, the developer and the community supporting it over the last few weeks which has been an awesome experience with lots of transparent communication.
RE: EXODE Card Opening, and a new Booster Promotion for one week!