dumb question - online pass code only come with a new game purchase. do you walk into a used game store, buy used game, and still get the online pass code? NO (but here on Gamefly im pretty sure you will)
almost all games with an online pass code have a trial download on your systems respective online store and i know all games with an online pass code have a $20 or so code purchase option in the stores
you cant have the online code cuz those 1 TIME USE ONLY codes are for the people who actually want to buy the game and if they just handed them out to anyone what would be the purpose of the code in the first place?
yes one of the points of Gamefly is to try before you buy but its your fault that you couldnt be bothered to take a few seconds to find out if the game requires a code - which Gamefly clearly states in BOLD LETTERS on the games page