Here, little depends on us, everyone should do his research. I like to contact the directors of the project. If they give me a contact and I can talk, then I do it and then draw conclusions from the conversation. Some are even willing to give a phone number so that you can communicate with the organization. So this is the only way for me at the moment.
Even if you will contact the directors of that project if they were scammers then the directors will just give you a promise that it's a legit project with a huge future. That's the difference between talking in phone and talking in the crypto events. You just waste your time in contacting them with no guarantee. If the project is legit those directors are busy and why they will give you time just to talk on a bounty hunter or a small time investors. Legit projects have many exposures in various crypto events and those should you consider.