What happens when I upgrade an activity? May 14, 2023 23:24 When you upgrade an activity the max queue size for the Cat Activity increases by 1 or you can upgrade to a Boost. Related to upgrade activities Related articles How do I expand my Cat Lounge? How does the Cat Lounge work? Apple ID (Apple Devices Only): I bought something but changed my mind - can I get a refund? What are Boosts?