Paying between $5-10/month, I (as the neurotic asshole I am) would memorize how many multiplayer maps the game launched with and expect at a rate of $5-10/month for the game developer to double and triple the amount of multiplayer maps every year that I am paying.
If I bought an FPS for $60 and it launched with 12 multiplayer maps, allowed a month free multiplayer access, and then I had to pay $5/month for continued access after my free month expired, I would expect the FPS to have 24 multiplayer maps a year after it is released, 36 the 3rd year, 48 the 4th year and on.
No, I don't see this happening and if it does, it better be a religious revelation everytime I play the pay-for-play FPS.
Furthermore, the failure of of a MMOJRPG with a storied past (Final Fantasy 11) and many more beloved games than the World of Warcraft is a necessary history lesson for any game developer who thinks online, pay-to-play is the way to go.
Do Pachter and his ilk think the World of Warcraft would have been a success without WarCraft, WarCraft 2, and WarCraft 3? If they do, then they are missing the reason why the World of WarCraft took off when it did and why it has stood apart and ontop on all other WoW-killer wannabes like the Age of Conan and WarHammer Online.
Games will pay for quality when the company putting out the pay-to-play game has a 10 plus year track record of quality along with the MMORPG picking up and finishing story lines from the previous games.
The only other company who I can see profiting off of pay-to-play is BioWare due to their history of beloved franchises such as Baldur's Gate, Neverwinter Nights, Star Wars: Knights of the Old Republic, Dragon Age, and Mass Effect.
I wonder many times why Final Fantasy 11 failed, while the World of Warcraft prospered? My best answer is that each WarCraft game builds off the other so that there is a continuous history for the gamers to expect to be adressed in the MMORPG, while each Final Fantasy game is a new game entirely different from the previous in story.
Looking at Final Fantasy 11, I could not tell if it was going to be set in Cecil's universe, Terra's universe, Cloud's universe, Squall's universe, Tidus's universe, or something entirely different. It ended up being the latter with chocobos and airships.
I would have picked up and stayed with Final Fantasy 11 if it was in Terra's universe where they did the World of Balance and then had a server event for the transition into the World of Ruin, but they had to go and make me not buy it by not placing the story in a Final Fantasy universe I knew.