2048 m BTC: change to 2btc
4096 m BTC: change to 4 BTCs
8192 m BTC: change to 8 BTCs
They do, there is a "commonize" function starting from 0.512 BTC. You pay around 2,35 % fee with doing that.
EDIT: Did not see the post of HeRetiK before, sorry.
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