from subscriptions, including subscription-based games such as The Lord of the Rings Online: Shadows of Angmar, Age of Conan: Hyborian Adventures, Dungeons & Dragons Online, and Champions Online. This move from a subscription based model to a free-to-play one has proven very beneficial in some cases. Star Wars: The Old Republic is a good example of a game that transitioned from subscription to free-to-play. Turbine as of September 10, 2010 has given an F2P with Cash shop option to The Lord of the Rings Online which resulted in a tripling of profit. Sony Online Entertainment's move to transition EverQuest from a subscription model into a hybrid F2P/subscription game was followed by a 125% spike in item sales, a 150% up-tick in unique log-ins, and over three times as many account registrations. The movement of free-to-play MMOs into the mainstream also coincided with experimentation with other genres as well. The model was picked up by larger developers and more diverse genres, with games such as Battlefield Heroes, Free Realms, Quake Live and Team Fortress 2 appearing in the late 2000s. The experimentation was not successful in every genre, however. Traditional real time strategy franchises such as Age of Empires and Command & Conquer both attempted free-to-play titles. Age of Empires Online was shut down in the midst of a tiny player base and stagnant revenue, and Command & Conquer: Generals 2 was shut down in alpha due to negative reactions from players. In 2011, revenue from free-to-play games overtook revenue from premium games in the top 100 games in Apple's App Store. The percentage of people that spend money on in-game items in these games ranges from 0.5% to 6%, depending on a game's quality and mechanics. Even though this means that a large number of people will never spend money in a game, it also means that the people that do spend money could amount to a sizeable number due to the fact that the game was given away for free. Indeed a report from mobile advertising company firm SWRV stated that only 1.5 percent of players opted to pay for in-game items, and that 50 percent of the revenue for such games often came from just ten percent of players. Nevertheless The Washington Post noted that the developers of two such games, Supercell (Clash of Clans) and Machine Zone (Game of War: Fire Age), were able to afford Super