Has anyone finally explained what kind of fulfilment of standards they are talking about here?

Yesterday I logged into Coinbase for the first time in about 4 months and was met with this message:

Unfortunately we have had to close your Coinbase account. Before your account can be closed, you will need to withdraw your bitcoin to an external wallet and any other funds to an attached bank account. Please be sure to delete any references to bitcoin addresses generated by Coinbase, as bitcoin sent to those addresses will not be retrievable once the account is closed. If you have any questions you may contact us at support@coinbase.com.

I just withdrew all of my BTC from coinbase account and now i see this error :

Unfortunately we have had to close your Coinbase account. Before your account can be closed, you will need to withdraw your bitcoin to an external wallet and any other funds to an attached bank account. Please be sure to delete any references to bitcoin addresses generated by Coinbase, as bitcoin sent to those addresses will not be retrievable once the account is closed. If you have any questions you may contact us at support@coinbase.com.

Here is there response upon logging in to a closed account:

Unfortunately we have had to close your Coinbase account. Before your account can be closed, you will need to withdraw your funds to an external wallet and any other funds to an attached bank account. Please be sure to delete any references to digital currency addresses generated by Coinbase, as funds sent to those addresses will not be retrievable once the account is closed. If you have any questions you may contact us at support@coinbase.com.

I'm a long-term customer of Coinbase. Had an account and a card with them for years with no issues. Today I received this:

Unfortunately we have to close your Coinbase account. Before your account can be closed, you’ll need to withdraw your crypto funds to an external wallet and your cash funds to a bank account associated with your Coinbase account. If you are currently enrolled in USD Coin rewards, you may want to wait up to 40 days before withdrawing funds to ensure you have received all eligible reward payouts. You will not be able to access these funds after account closure. Please take precautions when transferring cryptocurrency to an external wallet as transfers outside of Coinbase are irreversible. Please also be sure to delete any external references to cryptocurrency addresses generated by Coinbase, as funds sent to those addresses will not be accessible once the account is closed. If you have any questions you may visit https://support.coinbase.com.

No reason why, nothing. Is it common? Anyone here also dumped by Coinbase just like that? 

for some reason, I received two emails with slight differences. somehow they still offer their service as a wallet.