Nope, gilsellling actually keeps some people playing. Where some people are so confused as to not being able to make gil those that sell them gil keeps people playing. Like Khaotic who made different chars, some people wouldnt if they had to farm ALL of it back legitly, so buying gil keeps them in the game.IF you had a multimullion dollar corporation adn you invested on a MMORPG and you pay the expenses withthe cash people make and a few pirates(gil sellers) Are selling gil to players and the players are putting SE's profits into people taking advantage of Your MMORPG that your running and trying to make cash off of it? YOu lose millions literally. So to combat this you make it against the rules.
Currently it is still in the gray area, some court rulings are in favor of the player buying gil saying its THEIR data, not the game companies. Some do not even recognize it as a legit case, and some are in favor of game companies. Its one thing to say real currency, but its not, its just data, and no one really has too much legal ownership to that (at least thats what some courts are thinking of).
How are people getting around this? You are paying for their time to send you the gil, not the farming or anything, just the time and nothing is saying its illegal. IGE is the middleman, some people farm it up, sell it to IGE(ie: IGE pays for their transfer time), and they do the same to you.