Let's say I'm a World of Warcraft or Runescape player, in these games there are certain prices for gold, for example a X amount of ingame Runescape money might be worth a Y amount of real money. The game does not allow you to "Real-World trade" the money, this is written in the ToS you accept. Often getting caught leads to termination of ones account.
I have read this question and answer Is legal to sell virtual goods? but I'm wondering about the legality of earning money this way. If this is not illegal how would you do this legally? I guess it would be comparable to earning tickets at a arcade (you don't have to pay to earn them) the arcade says you can't sell the tickets for money but you do so anyway.