I'm going to chime in, but only from my time at the helm of Affordable$$Audio:
For the years 2006,7,8,9, A$$A gave out on average 16 "Best of" awards each year out of approximately 75 reviews, that turns out to be 21%. Each writer was allowed to choose whatever they wished without interference from me. Since the staff is all-volunteer advertising never entered into the equation.
Like any "Best of" article, so much it is /entertainmentfun, for both readers and staff.