Mostly as long as I know main problem on closing accounts associated with gambling.Have any other reason?
There was a big issue about coinbase service in the US and that includes their government. When the IRS(correct me if I'm wrong) demanded that coinbase should provide the list of bitcoin users for 2013-2015(again correct me if im wrong) and As far as i know there were a lot of US citizen in the coinbase that verified their identity(that could cause them tax evation i guess) and that is not a good thing. Aside from that well users don't trust online wallet that much anyways.