I see a lots of ICO with the use of their coins are similar. They raised money, got them and ran away.
No it is not true. I have participated in over 200 ICO's and I have had only one where the people behind the project ran away with the money. Some have done a really bad job of putting the money to work and advanced the project, others are working hard on the project. I don't think you can classify a business where the people do the work but the project fails to take off as a scam.