Final answer:
A negative comparison advertisement may lead to disfavor towards the sponsor brand due to the use of the bandwagon fallacy, association with negative stimuli, consumer cynicism, and over-saturation of aggressive marketing messages.
Step-by-step explanation:
A negative comparison ad that leads to people not liking the sponsor brand may be due to a variety of factors. One such factor is the bandwagon fallacy, where the ad creates an impression that everyone is using a product, which can backfire if perceived as inauthentic. Another factor is the utilization of negative campaign strategies that may cause the public to associate negative feelings with the product, as they do when companies swiftly drop endorsements following an athlete's scandal. Moreover, negative ads may foster cynicism, making viewers suspicious of the brand and eroding trust. The concept of conditioning also plays a role; if a brand is associated with negative stimuli, consumers become conditioned to respond negatively to the product. Finally, exposure to ads across multiple platforms can result in over-saturation and potentially contribute to negative perceptions, particularly if the marketing messages are aggressive or manipulative.