Im not sure if that option was available the last time I used NiceHash, or why I left those funds there. When I received the first notification about an inactivity fee, I tried to withdraw the funds. However, I was then prompted to complete a full KYC verification. It wasnt worth it.
I don't know how it works, but one miner writes that he recently withdrew coins with no problems, and another miner writes that he is required to pass KYC. I recommend everyone to try it and then make a decision. The good thing is that nicehash has many alternatives