However, to appeal to gamers who prefer to play without purchasing the game, we will also include time-cards that will allow a specific number of gameplay hours.
Interesting. So you can opt to have some sort of "monthly fee" system now?
Some people find this game gets boring for them after a month or so;
If a 2 month time-card were $30, and they got bored by the end of the second month and never wanted to play again, they'd save $20.
However, they cite hours, so I'd make a somewhat random guess along the lines of 200 hour time cards for $15-20. If 700 hours is the average max playing time for people, then that'd almost be $50 to match time for time.