What determines why only one offer decision appears in the list when adding it to an email?

The reason why only one offer decision appears in the list when adding it to an email is that only one offer decision matches the selected placement. This scenario typically arises when the specified placement criteria for the email restrict the available options to a single offer. The placement might be defined to target specific audiences or conditions, resulting in just one applicable offer being displayed.

When placements are set up strategically, they help in managing which offers are relevant and suitable based on the context of the communication and the target audience. For instance, if the email is designed for a specific campaign or segment, the associated offers must align with that particular focus. Thus, when the criteria for placements filter the offers, it can limit the options to just one that meets the defined parameters, ensuring that the recipient sees the most relevant content.