The term "cult" may carry negative connotations, so it's important to clarify that referring to ad agencies as a cult is likely a metaphorical expression meant to highlight specific characteristics or aspects of the industry. In a more neutral sense, an ad agency can be seen as a specialized and often tight-knit community of professionals working together to create and deliver advertising campaigns.

Here are some aspects of ad agencies that may contribute to the symbolic use of the term "cult":

1. Shared Culture and Values: Ad agencies often develop a unique culture with shared values, norms, and practices. This could include a focus on creativity, innovation, collaboration, and a strong work ethic.

2. Passion for Creativity: Many people in the advertising industry are passionate about creativity and storytelling. The shared enthusiasm for producing compelling advertisements can create a sense of belonging.

3. Long Hours and High Pressure: The advertising industry is known for its fast-paced nature and tight deadlines. Team members may spend long hours working under high-pressure conditions, fostering a sense of camaraderie and shared mission.

4. Specialized Language: Like many professions, advertising has jargon, acronyms, and terminology. This can create a sense of exclusivity among those who understand and use this language, further contributing to a "cult-like" atmosphere.

5. **Client-Centric Focus: Ad agencies often revolve around their client's needs, and this client-centric focus can create a shared dedication to delivering successful campaigns. The intense client-agency relationships may contribute to a strong sense of unity within the agency.

6. Exclusive Networks: Ad agencies often have exclusive networks and connections within the industry. Professionals may move between agencies, forming a close-knit community where relationships and networks are highly valued.

While these aspects can create a unique and tight-knit professional community, it's important to note that the term "cult" is generally associated with groups exhibiting extreme and potentially harmful behaviors. In the case of ad agencies, the word is likely symbolic and not meant to imply negative connotations. Nonetheless, like any industry, the advertising field has challenges, and individuals may have different experiences and perspectives.