I wasn't suggesting C-CEX was scammy.  It's just that if scammy exchanges do hear about such things it would be quite easy to fake a similar scenario in the future in order to extort coins from us.

It's quite simple, the party that made the error should carry the burden of the cost.  Exchanges are in the business of listing and updating coins as needed; and this exchange simply failed to do their job properly.

I don't see what's left to discuss, they need to reimburse their customers [before the price sky-rockets] or not; it's their choice.