Employees were stealing from the company, there were no internal controls...the rules for VC are...different. If you were on a Board and this happened on your watch, you would never work on another Board again. If you did this in PE, fired. If you invested in such a public company, very likely fired or irreparable damage to your reputation.
Sequoia are a huge fund, they are one of the doyens of the industry...it isn't even that they failed, they didn't even put in place the mechanism to try to protect their investor's money. It is unbelivable.