How good is your exit IP?
A site's risk engine sees more than your country. This folds proxy / VPN / Tor / datacenter flags, blacklists and abuse reports into one 0–100 score: the higher, the more your exit looks like ordinary home broadband.
Almost every circumvention exit is a datacenter address: operators need big pipes, predictable pricing and servers that hold hundreds of users, and only a datacenter offers that. So the "datacenter" flag by itself is not a problem and does not mean you did anything wrong.
What affects you is how each site reacts to the flag: more captchas at login and signup, some services refusing to send SMS codes, streaming services deciding you are "not a local viewer", payment risk engines counting a datacenter IP against you.
A shared exit means other people's behaviour lands on you. When a node suddenly triggers captchas everywhere, it has usually been burned by a neighbour. Blacklists and abuse reports attach to specific addresses and can vanish when you switch; the datacenter flag attaches to the provider and mostly stays.
The remedies are limited but real: switch to nodes your provider labels "native IP" or residential; keep sensitive things (banking, your main account) off a shared exit; and if one node keeps getting rejected by one site, stop fighting it there.
Enter any public IPv4 / IPv6 address to score it with the same rules. Up to 30 lookups per hour.