Where this all starts to smell a little funny is how badly and strangely this was rolled out, how they allowed some trades, and how the price crept up 50-100% before the announcement. Someone said they accidentally released some bitcoin cash UI feature that tipped people off a few days ago. More incompetence.
I don't know of UI slips, but that'd be incompetente, yes.
"...we do not believe it is safe to allow support for Bitcoin Gold at this time. If the blockchain proves to be secure and valuable, GDAX may choose to support it and at that point credit your account with an amount of Bitcoin Gold equal to your Bitcoin (BTC) balance at the time of the fork."
https://blog.gdax.com/timeline-and-support-bitcoin-segwit2x-...
Made 250k profit just today alone.
Seems like that's ripe for enumeration...
For the last two months, they have said they plan to add it. In fact, Bitcoin Cash was about 280 dollars and it was common knowledge Coinbase was going to support it. You, the employees, and everyone else could have loaded up if you wanted to.
Lastly, there is no real incentive for employees to load up on BCH to make a quick buck. In the first seconds of trading a massive sell wall of 12,000 orders emerged and that would drive the price down dramatically.