have you asked their support about the inactivity fees? I've seen platforms have rules that they will deduct a certain amount of money on an account if it stays dormant for a certain period of time. These kinds of rules are also not exclusive to exchange sites since I've also seen them on online casinos. also, as far as I know, before they start deducting money from an account because of inactivity they will send notifications to the owner that their account is inactive and that money will be deducted from it if it has funds in it.