The parent said (emphasis mine): > Because credit card system is not sustainable and you say: > I have never paid [...] and everything sails smoothly. The p

The parent said (emphasis mine): > Because credit card system is not sustainable and you say: > I have never paid [...] and everything sails smoothly. The parent is talking about the system as a whole, while you are talking about your individual usage/experience. Is it not possible that your usage is subsidized by those less financially organized?