What an absurd article. On the intra exchange example you start with ETH and end with USDT. Any profit is thus illusory. You need to start and end with the same reference currency. In other words, switch USDT for ETH,ETH for Vee, Vee back to USDT. Total nonsense not to begin the trade and end it in the same reference currency. I'm sorry to appear rude but honestly, this is complete and utter nonsense.