This is exactly the reason I can't seen anything being changed in the store, Tebex offer chargeback protection where they meet the costs of any chargebacks so I would assume that this whole 'Carding' situation is actually beneficial for Invaded to keep from a financial standpoint. If it was me, I'd leave it in and keep letting the money flow in.
For anyone who has done the 'Carding' and reads this, what you are you doing is fraud. Yes, it's small scale fraud but it is still fraud. Banks and financial institutions put a lot of money into investigating this sort of crime, thinking you are safe by using a VPN or whatever other 'precautions' you take to 'hide' yourself will not work. There's a good chance you'll get away with it because of the small scale of it, but if you do get caught you will have ruined your life for a Minecraft server. Not only could you go to prison but you would never be able to take out a credit card/ mortgage/ loan etc for the rest of your life and will end up living with Mummy and Daddy until the day they die.