There is something shady about this company. Their hosting is located in Costa Rica a known area for cyber criminals. If this company decides to close doors and run. There is little any one can do to them. I would consider long and hard giving them your business in the future.
Their hosting isn't actually in Costa Rica. Their servers are behind CloudFlare:
https://www.robtex.com/dns/coinex.pw.html?tab=result#records . CloudFlare has servers in datacenters around the world. In reality, I can guess that CoinEx's actual servers are in one of three places: Russia, US, somewhere in Europe. I know for a fact two of those are correct.
Before going all wild-eyed and conspiratorial, you may want to take a step back, take a breath, and understand what their DNS records actually say. Because it's not what you think it says. And if they really were criminals (and frankly, they'd be terrible ones), they wouldn't host in Costa Rica, they'd host in eastern Europe.
Dude learn something. Costa Rica is the #1 safe haven for Cyber Criminal who's targeting the US. GOOGLE IT. This is why many Rogue Online Casino owners who target USA players move there. They get away with non payment of its players. Coinex is hosting out of Costa Rica.