Why did you decide they were scammers?
Why?
as it is possible that a project that supposedly should be serious has this problem:
The BlockBroker ICO is ongoing. The CEO's name is 'John Jacobs'. Jacobs' profile picture appears to show the same person as a Photographer named 'Alex Amadeo'.
if it were an honest and serious project it would never happen
I couldn't find any video that one of their team member comes out and talk about their project and ICO. They have a youtube channel and they don't want to upload or do a live streaming to show that the team is a real team. Personally I don't look at LinkedIn profiles as anyone can create a fake LinkedIn account and show that they are professionals. There is no exact address to find out whether they are really exist as a start up.
It's a suspicious ICO for me.
If they do not want to prove that they exist and are very responsible people then they are scammers