I've always wondered about this—on a certain top-tier exchange's OTC trading area, are those merchants really making money? The most outrageous thing is that some are selling USDT directly at cost, with no price difference at all. How does this even work? It can't be that they're doing charity, right?

Thinking carefully, these merchants selling at low prices are either building account credibility to increase trading volume or involved in fund matching services behind the scenes. It's also possible that some big players are liquidating their holdings, preferring quick cash over small profits. Or perhaps they’re not relying on the buy-sell spread at all, but earning profits through high-frequency liquidity trading in other segments.

Or maybe I’ve misunderstood something—has anyone encountered this situation?