if I understand it correctly, under 50 mBTC (0.05 BTC) the system won't charge the fee?
Correct.
and if I prefer to withdraw in voucher code (not chips) also I won't get charged that fee.
so the fee applies only on over 50 mbtc deposit that withdraws to chips... do I get this right?
Step 1:
Mixing fee is 2% of deposited amount.
It says the fee is taken when you deposit, it doesn't matter if you withdraw to chips or voucher.
I think this should be updated though. By my math it should be:
Depositing 1.2345 BTC will result with 1.234 1.210 BTC funds.
Depositing 0.1239 BTC will result with 0.123 0.122 BTC funds.
Depositing 0.1230 BTC will result with 0.123 0.121 BTC funds.