Forget advisers, what if after sales they don't act on the advise of the advisory boards? John McAfee once supported an ICO and the price fell like tsunami when it got to the exchange and I loss big. I will not be deceived by any paid professional hired as an adviser. Good team will always deliver when handling a good project even without advisory board.
a well-known and reputable advisor is not a 100% guarantee that a project will succeed. there are many other factors that influence, so don't make it an absolute decision. the opinion of influential advisors can strengthen investor trust, but still must do independent analysis and invest safely.