I see how that can happen. It's not even wanting to keep the board for yourself, but getting more boards to review for the next year to keep the site going?
What a flawed system. Industry standard should be, send the damn board back.
But even sending the board back won't solve your issue about future reviews. Under the current system, a reviewer basically has to like or kinda like almost every board if they expect that company to continue sending them samples.
Even if they send the sample back, a bad review causing a company to stop sending samples basically limits the content of the site and then the guy's livelihood. Basically then we can only trust hobbyist reviewers like aGNARchy who don't depend on their site to make a living.