RE: I purchased 15 foundation card packs!

They have made it difficult to use old cards by asking 2000 DEC fee for playing in wild format where one can use one's old cards viz. alpha, beta, chaos legion etc. 2000 DEC is a fee for wild pass that is valid for roughly 15 days. So, there is no profit in buying wild pass. Also, they are printing too many cards. In order to sell new card sets they are making it harder to use old cards.
Also the model is wrong. A single card having BCX of 1 is more costly then the combined cards. Suppose you have a single card which price is 1 then you combine 14 cards for leveling up to 3. So, you'll have to spend 14 USD. But, price per BCX will be just $0.10. It means You cannot sell that card above $1. So, there is a loss of $13 for you.