from my experience I usually see from their roadmap if it is not as planned, I will try to ask the team directly sometimes they have funny reasons for example to register to the exchange the reason most often found is they are waiting for good market conditions, and after good market conditions the project still does not implement it and it has been 100% scam and can also be seen from their community on social media whether it contains genuine people or fake people because I am often deceived by the number of people in their community, differentiating fake and genuine people from their activities in the community if you are quiet of questions or chat you must be vigilant
To add also, most of the crap projects have generic content of roadmap, whereas, the authentic ones have detailed items listed on their roadmap.
You can also see how each item is being completed. And they have straightforward answers when you try to inquire about those items.
Also, you can see their company registration on their website itself if they are running legit or you can look for it on their wp.
