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?
Depends on the 3rd party escrow. If the person has green trusted on forum then you'll lucky its legit. If its scam that person, will go down immediately as scam and hoax can't be tolerate here in forum. The people who hides in anonymousity is quite scary to invest with but remember Satoshi who creates the number 1 crypto is still unknown.
strange if escrow accepts offers from projects that structurally have data obscurity, especially those involving teams and developers. reputation will be at stake if escrow makes a blunder with details of the project that are not strong even though they act as guarantor. I am sure there are special considerations from those who accept the offer and can be considered right based on their perspective.