That's because the article is incorrect and Sony never invested in 2005, they nearly invested. In the end it was Insight Venture Partners who invested in October 2005. The article is just misleading but not incorrect, "Was willing" doesnt mean they have done it. Ah, I had assumed Omali was referring to the Massively article which incorrectly states "Ultimately, Jagex was able to parlay their success into an investment deal with Sony". The article from gamepolitics is indeed merely potentially misleading.