Sorry but I do not see why principal-agent-problem (PAP) does apply. PAP describes troubles that arise from information asymmetry. Abuse of informational advantage can result in manipulation of prices for example.
I do not see where XYO implemented a good signaling that works out that issue. Maybe it is me, but stating something like bringing in friends and family is not convincing to me.
One factor of PAP, moral hazard, is directly linked to information asymmetry. But isn't that what blockchain is designed to reduce?
XYO is based on the blockchain so it provides far more transparency to any incident of PAP than that'd occur within traditional capital raising. That is the case despite the regulations of 2008.
Now, my point was that the fact that the team's families money is in this, and they have shoved aside private deals, we can conclude that their own moral compass (driven by love for family) and honesty (evidenced by them turning down private deals) are a testament to how this project may have far less dangers of PAP than most ICOs.