Unless I'm almost certain that I really want to work at the place and it's just a last step of the interview process I'm fine with coding for a few hours, be it

Unless I'm almost certain that I really want to work at the place and it's just a last step of the interview process I'm fine with coding for a few hours, be it on-site or at home. But otherwise, if it's more than 2 hours, there is no way I gonna do that again, such a waste of time. The longest one I did was more than 10 hours and I didn't even get any feedback about the code. Billing is smart though, I'll always ask for that from now on.