Final answer:
The hardest type of consumer to move up the fan escalator of involvement is the heavy user.
Step-by-step explanation:
The hardest type of consumer to move up the fan escalator of involvement is the heavy user.
The fan escalator of involvement refers to the stages of consumer engagement, ranging from being unaware of a product or service to being a highly engaged advocate. Heavy users are already deeply involved and satisfied with a product or service, making it difficult to convince them to move up the escalator. Light users, on the other hand, have a lower level of involvement and are more receptive to increasing their engagement.