Yup, you read that right. Perlmutter Properties was suspended from having a CoStar account a couple of weeks ago, because I started QuantumListing.com. Even though they are two separate companies, there is something in the fine print of the CoStar agreement (and that agreement is written in the tiniest font imaginable, pretty much guaranteeing that no one ever reads it), that gives them the right to suspend a user who they perceive to be a competitor. 

So, if you are reading this, and have not joined QuantumListing.com yet, please do so, and add your listings if you have them!