Does the exchange rate really matter?!! Some people can afford it and are willing to pay, some people genuinely cannot get together that much money in one go, and some probably could afford it but are not willing to pay. There are plenty of people in each of those categories.
As for restrictions, I haven't heard Fencer mention anything about this, and a general discussion (I think someone also said earlier) about it will never reach any kind of agreement! (Except maybe that players shouldn't have limited moves! LOL! And I'm sure there will be people who disagree with that too!)