'Thank you for your help. It's strange, especially excavator doesn't take any fee (probably as NiceHash wrote).

Also if may I ask - I've seen multiple multi-algo switcher, hovewer no one of them allowed to change GPU overclock whiles witching to other algorithm. Running GPU at default clocks is waste of energy and power. Is there any way to do it? Execute additional .bat on algo switchiung, which runs specific nvidiainspector profile-settings file?