There was also rampant cheating/hacking/smurfing/alt boosting etc going on that gave the top 100 a bad stigma. Generally it was seen or perceived to be if you got a top 100 reward, you had cheated to get there, and also meant less spots available at the top 100 for actual players to reach. As well, since rank decay isn't a thing here that also dis-incentivized people to populate queues.