So the people who keep their bitcoins on Coinbase were not allowed to trade Bitcoin Cash (until 2018) and that coin was worth up to half the value of Bitcoin itself. But Coinbase just decided not to let their customers get that.
Then Bitcoin Gold (which was worth up to 10% of the value of Bitcoin) was not supported at all by Coinbase, so their customers didn’t get any of that as well.
Fortunately, Coinbase in their infinite generosity, has deigned to support Coinbase2x, so maybe Coinbase customers will finally get some value from the forks.
This is all making me seriously reconsider keeping my coins at Coinbase.