Let's see here, you can rent a bunch of old games for $50 each for 90 days.....or you can buy five times that amount of games on Steam and you will own them forever. I'm not a mathematician but I think gaming on the PC is a better deal.
Right now, on your PlayStation 4, you can enjoy 90 days of the PS3 racing game F1 2013 for the low, low price of $49.99. Too rich for your blood? You could try 90 days of NASCAR 14 for $39.99, or 90 days of Dirt 3 for $26.99. Codemasters' Grid 2 comes in at the relatively affordable $22.99—also for 90 days.