My opinion on self rates not playing post season is simple. Most people join a competitive league to win. Very few would be psychologically capable of ranking matches for an entire year, just to possibly dominate in year 2. But, if a few sneak through that way...all the power to them.
I just think you'll end up with far fewer sandbaggers in year 2 than year 1 if you get a year of data on them. To me, it just seems simple. I don't care if self rates are in a local league, but soooo many get DQd at districts and sectionals that it makes me wonder...what team would've been here that played by the rules instead of this team that cheated?