By your description alone, it's definitely a scam no doubt. Quite a clever one though due to the domain. It's easy to assume that it's easy for people to click on a bitumb link thinking it's the Korean exchange bit
humb. Also, 0.02 BTC for a withdrawal fee? They're not even trying to be subtle LOL.
i also have difficulty registering with bithumb. the language was a serious issue. mails comes in korean language. quite not clear to me.
Well, it's obviously a Korean exchange so what do you expect. There are a lot of alternatives if you can't read/speak Korean.