Opensea has no policy against employees insider trading. Only after this PR disaster (which will not get much media attention) did Opensea start to talk about talking about implementing a policy to prevent insider trading.
The SEC will not do a thing
The employee, head of product, is a representative of OpenSea- the ultimate blame is on OpenSea
Coinbase and Charlie Lee did the same thing with LTC
The wolf watching the hen house
OpenSea more protected than Coinbase because only one lawsuit from the buyer can sue (only one harmed) vs Coinbase LTC (many buyers with a fungible token)
The front page of Opensea is a promotion and scam itself
A smart insider trader would sell insider knowledge where the criminal trail doesn't lead back to them on the blockchain