Which of the following is NOT true about blind advertisements?

Blind advertisements are those that do not disclose the identity of the entity responsible for the advertisement. The key feature of a blind ad is that it does not provide a clear connection to the firm offering the service, which can make them somewhat controversial in compliance with regulations.

The statement that blind advertisements must include the firm's name is not true, because the essence of a blind ad is that it does not identify the firm. Such advertisements typically lack specific identifying information, which is why they are classified as "blind."

Conversely, the other choices illustrate characteristics and acceptable practices surrounding blind advertisements. They can indeed be used for recruiting purposes, as they may draw in potential job candidates without revealing specific company details initially. Additionally, they can promote existing services as long as the content does not mislead consumers. Furthermore, the fact that they do not disclose the entity provides a layer of anonymity that some advertisers may seek for specific marketing strategies.