Fans of this year’s modern MMO The Secret World have been expecting this kind of news for a while — the game is transitioning to a “Pay Once, Play Forever” model. Despite tons of hype and delivering a unique, high-quality game, TSW has struggled to compete with 2012’s other big MMO releases, Diablo 3 and Guild Wars 2, both of which were free-to-play on launch. From what I’ve read, a lot of people feel that free-to-play is the “future” of all MMOs, and Funcom’s gamble of using a subscription-based model on the cusp of that change unfortunately hasn’t paid off. The…