I played Dragon's Prophet for a while (a free to play MMO). While I thoroughly enjoyed the gameplay I just got tired of fighting my own temptation to spend on the cash shop to advance quicker.
So no, as the article points out I have no purely rational reason for avoiding free-to-play games. That said, I have no purely rational reason for playing games in the first place, it's a choice I make purely on how a game environment resonates with my own subjective perception. A game that feels like a shady carnival with carnival barkers clamoring for the most cash they can drain from me just doesn't appeal to me. How "fair" that attitude is to game developers and publishers is, to me, quite irrelevant.