I know it's very difficult to find the best signature campaign maybe you can base on their platform and product especially to the manager and their team to check their previous campaign to prevent scam.
we can trust a manager in choosing a signature campaign. because in my opinion a good manager will not carelessly handle a project, and although that also does not guarantee success but at least if the manager has a good record in handling the project then our potential to succeed in choosing a project will also be even greater.