I saw a project and on that project I did not see the team and DEV from the project. however they use Escrow with good positive trust, can it be a determinant that the project will not be scam?
It's not the determining factor, but one of the signs that the site is doing it's best to make the project as legit as possible, it's still the people that's running the site that matters, if their reputation, is good then they will launch and complete their roadmap, but if they have a bad intention, then your money is gone.