The difference between Bithumb.com and Bithumb.pro is that the pro variant focuses on clients outside South Korea, hence the reason it refers to itself as Bithumb Global.
https://coinmarketcap.com/exchanges/bithumb/ Native KRW trading pairs.
https://coinmarketcap.com/exchanges/bithumb-global/ Native USDT and BTC trading pairs.
To some degree it's a similar construction as Binance.com and soon Binance through BAM trading services that plans to serve users that the Binance.com site not accepts through a proxy.
By that being said they are authorized by the Bithumb.com to run a global version of it right? Therefore the said .pro is actually legit at some point and would only differ by their management and services offered. I am having a hard time understanding the situation, to why does it needs to be done by other set of individuals to run a similar platform like this one and soon in Binance.
I have contacted its customer service, bithumb.pro will develop its business that bithumb.com cannot do in Korea, Lol.
Like? Scamming? lol they should be specific