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You got the answer as well from @erep, he asking via "Live support". There is no fee at all, BK8 only (Rate Convert Crypto From USD to Crypto You're Choosing + Estimation Crypto You Will Get).
@sapta also apologizes for the mistake as well.
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No, is wrong.
For example with IDR, the minimum withdrawal is 2,000. But 1 = Rp.1,000. So, the minimum withdrawal in around 130$+.