Answers given by someone else on this site indicated an assumption that minimum credit card payments were always at least the amount of interest that would be charged, meaning that the balance would always go down as long as minimum payments were made.
I found a counterexample of this, where the minimum payment was 5% of the balance (and interest rates much more than this) and thus if you make the minimum payment only your balance will always increase. It was pointed out to me that this was a Canadian card.
Do different countries have different regulations, or is this me making a mistake?