There's an interesting phenomenon: investing over $800 to invite an influential person on social media to promote a project, originally expecting her to become the growth engine of the project. But what happened? She posted one tweet and then disappeared without a trace. Later, when asked if she could be more active in the community, participate in discussions and interactions, the response was lukewarm. This situation is not uncommon in small coin communities—there's a huge gap between marketing investment and actual engagement. Sometimes, having a reputation does not equate to genuine community contribution, which is a lesson many project teams need to learn when choosing community ambassadors.