At a point the team start given excuses to abide by what they promised to do or stop communicating with the community then I can sense the project is scam. How do you determine a project is gone bad and won't fulfil it promise? What criteria do you use ? or you wait for years thinking all will be well ?
You can look at their github repository. If no new changes occurred within the past 2 months, the team is probably preparing for an exit scam. Also you can check random paragraphs in the net to check if the owner is legit and is not plagiarizing.