Remember, Matsui wasn't in charge until it was too late to switch to a Windows development environment. Tanaka was still in charge then. Treasures of Aht Urhgan wasn't even in the roiginal development plan, they only planned for the Zilart and Promathia expansions.

F2P games weren't super big in 2006 either. Now mobile platforms make them shine, but the model back then was subscriptions, and the whoile game would have to be overhauled for F2P mechanics, and we'd have to hope they weren't poorly done and abusive to players.