Why USDT works for hosting in Singapore
USDT holds its dollar value, so the invoice never drifts between the quote and the transfer. In Singapore the alternative is a card billed in dollars against a Singapore dollar (SGD) balance. Most local cards are billed in SGD, so a dollar invoice may carry a foreign-transaction or conversion fee — that part is set by the bank, not by us.
Paying from a wallet takes the bank out of the transaction. The invoice is priced in US dollars, the USDT amount is locked for 15 minutes at the live rate, and the transfer goes straight to the address on the invoice. Nothing to approve, no merchant category to argue about.