I spend about an hour or closer to 2 hours on a Race.
I get uncomfortable spending more than 2 hours per Ratings session.

What is important is that you decide how much your time is worth.
And get paid in winnings accordingly.
It don't matter whether you rate 1 or 101 races.

What aaaaes me off is when I spend 2 hours on a race and then the runners don't do even close as I calculated.
I HATE THAT