Last week there was a thread about Texas “pay to play”. The news telecast focused on Judge Fite Century 21. The TREC administrator stated there were no complaints or laws being broken. This is further reinforced by a TREC inspector committee member who is on the advertising list. He has been on the inspector committee for a long time and is well aware of the Rules. He would not be paying for this advertising if it were not ethical and legal.
Edited: Have discovered many more direct advertising methods. It seems as long as it is open to all it is not considered unethical .