I think all projects that are based on me have a good purpose or there is no investment intention, maybe what happens when they encounter problems and are difficult to complete and in the end their product is defective or fails so they choose to leave it.
I'm sure that many projects were originally designed to be scams, this can be seen from various manipulations such as whitepapers that imitate other projects, creating fake teams and so on, as long as the project is serious, of course they will have the best solution for the problems that occur.