Not really, but if I invert, I don't think x% of sales sounds like a good incentive.
In general, I more easily know what I don't like because it stands out, usually as too much or as not incentivizing the right things.
I think the general idea should probably be that the board compensation should be competitive within the industry so that you can get the right kind of people on your board.
Ideally they would be paid a token amount and have huge stock ownership, but that's rarely the case.