Many people know that this exchange is very friendly to both beginners and experienced traders, but it also has a hidden feature that is easily overlooked. That is the margin interest earning module, which has a clever design logic — the margin you use in perpetual contracts can start earning interest during the opening phase. This is not a gimmick; the maximum annualized rate can reach 22%. Essentially, as long as you hold your position without moving, your funds are working for you in the background to appreciate in value. This can be quite interesting for long-term traders.