It seems to me that they just need to provide their audit repors to prove not only to their investors, but to all that they are a honest project. If not, then this is another scam. 
Really, if project doent't want to publish their audit report, ist seems to be there is smth to hide from investors If you know what i meanGuys, only today found an excellent project that provides an audit of ICO projects, check out their website: audit.darfchain.com