Common
Pay-to-play
Exchange of money for the privilege to engage in a specific activity
Pay-to-play
Pay-to-play (P2P), sometimes called pay-for-play, is a situation in which money is exchanged for services or the privilege to engage in certain activities. The common denominator of all forms of pay-to-play is that one must pay to "get in the game", with the sports analogy frequently arising.
Open boosters, collect cards and trade them. Free to play.
Play for free