Encourages players to play as much as possible to get their money's worth.
"There's a different price depending on whether you subscribe for one, two or three month. The last option is the most profitable, but it encourages you to play for longer."
"Season reward chains that change monthly require buying a “pass” for each one to access better rewards"
"it gives the premium currency at better prices that get payed out daily for the month"
"There is a monthly season pass that includes a card that usually defines the meta game for the month, thus creating a desire to own it."
"several possibilities for "monthly" fees (or 14 days) for different sections of the game"