Lately after strange moves from CoinBase team towards ETH people started digging deeper.
Its said that due to missing enough profits for round 4 they were so eager to add ETH and take parts of profits from massive volume - even though they didnt add LTC with so many people waiting.
There are already mentions that owner has highly invested into ETH and he as even voting up for Hard Fork, which got him alot of criticism in last days ( http://www.newsbtc.com/2016/07/19/brian-armstrong-etheruem-hard-fork/ ).
The guy here sums up situation of CB: http://thestringpuller.com/2016/06/the-coinbase-implosion-timer/
tldr; He says they got so overpriced and employeed so many people the company may be at even $20M deficit.
