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Why card-free hosting is different
A card payment for hosting needs a number, an expiry date and usually a billing address that matches the card. Paying with USDT removes all three: checkout asks for an email and a domain, shows a USDT amount on the TRC20 / BEP20 / ERC20 network, and waits for a wallet transfer. Nothing is stored that could be charged again later.
That also removes the familiar card failure modes — declines on foreign merchants, 3-D Secure loops, monthly currency conversion and surprise renewals. You pay once for the year, on purpose, from a wallet you control. If you choose not to renew, nothing is charged, because there is no card on file.