How I influence my friend to go dual boxing?

My friend was curious about dual boxing for some time but he didn't jump into it.

So one day, he message me about what is like to be playing 3 chars. I just told him that it is like playing a RTS game in a MMORPG game. The next day, he have went out and buy 2 more account and started dual boxing.

I guess he like the idea of RTS game play in a MMORPG game.

I am sure my friend will know his own financial status. If he can't afford the subscription, I am sure he will not go out to get 2 more account.