Don't use them for any exchange, as a matter of fact. Nor should you use any datacenter IP.
These kinds of exchanges that are allowed in United States will make KYC/verification compulsory for all their customers. If KYC is compulsory, then why using VPN when the people identity is known already? I see no reason people should use VPN for KYC accounts if they are legitimately the owner of the documents submitted online that got them verified on the exchange. I agree with this but not for all exchanges.
You are right on your own but I think you ignore the fact that majority of users of their product are average people in crypto space. You are an advanced internet user who knows about Bitcoin, VPN, Tor, Anonymity, security and so on but the majority of internet users are very dumb. Do you remember the scam lottery popup? Millions of people got popup on websites that was telling them that they have won the lottery and they needed to fill the information to claim it. Millions of people filled the information. Yes, people are that dumb. So, Coinbase's risk model makes sense for an average user. Since hackers use VPN, Coinbase will block the account of user and the average user will survive another hack. It's a good feature for an average Joe.
How am I supposed to know whether it's a datacenter IP? My device is always connected to the VPN, whether I'm using the forum or other forum or surfing through the internet, I mean all the time. Should I be worried?
I used coinbase in the past but I don't use it anymore. Not a big fan of coinbase!
If you don't use Coinbase, then you shouldn't be worried.