Of course if you look at it like that it looks like a lot of money, if you worked out how much money you have spent on food in the same time frame you would say, i shouldn't have eaten that much.
Point is if you didnt have SWTOR what would your money be going towards? Games that cost $80-$100 that last you a month playing? I rekon $15 a month is a GREAT price and is saving me a lot money, so will continue to sub as this is STILL a fantastic game to play