Which address receives the energy?
The address that sent the TRX. Pay from the wallet that will send the USDT. Do not withdraw the TRX from an exchange.
When do I send 2 TRX, and when 4 TRX?
If the address you are paying already holds USDT, send 2 TRX and receive 65,000 energy, enough for one such transfer. If it holds no USDT, send 4 TRX and receive 131,000 energy. A send from an exchange counts as no USDT: send 4 TRX.
How long does the energy last?
For 1 hour after it arrives. It is then taken back. Send the USDT within that hour.
If I pay, will the energy arrive?
Yes, when the amount is exactly 2 TRX or 4 TRX and it goes to the energy address. A payment to the swap address, or any other amount, is not handled as an energy order. If nothing arrives after a few minutes, send the transaction hash to support.