Topic: Plex
many of my friends from eve played eve without paying real money. this is because they had lots and lots of time, but not very much money IRL. here's how they did it:
1) grind lots and lots of moneys in game
2) buy "plex" (pilots liscence extension) from people who had IRL $$$, but not enough time to grind to support their pvp habit or whatever.
plex was purchasable for real cash, and represented a month's sub. the rich IRL players purchase this with real money to sell ingame to people with lots of game money and time so they can all play more happily.
the difference between this and the NEX market they are considering is this, the rich player could only buy stuff from the market that players had made, and the isk did not come from nowhere. in the current model of the NEX store, players can buy stuff that pops out of nowhere (no manufacturing) that they can still sell on the market.
here's the important question, after all that explaining: can your timecodes in Perpetuum be legally traded for ingame money? if so, many of my friends will happily switch. if not, then they may have to kick the MMO habit altogether.