Answer:
availability heuristic
Step-by-step explanation:
Availability heuristic: The term availability heuristic is defined as an individual's mental shortcut that depends on the sudden examples came to his or her mind while evaluating a particular concept, decision, topic, or method.
In other words, the availability heuristic refers to the process of an individual making a decision based on their mental shortcut that helps him or her to bring something into conscious mind easily.
In the question above, the lottery promoters are most clearly exploiting the influence of availability heuristic.