The most ubiquitous and unblockable form of VPN is international cellular roaming. (While roaming, all traffic is tunneled back to the home carrier and blends in with their traffic.)
Of course, it's the most tedious VPN. It's also the most expensive. But what subset of traffic actually needs to go over the VPN? Like authentication and bot detection, these types of checks tend to be too expensive to perform on every request to every service endpoint.
The most ubiquitous and unblockable form of VPN is international cellular roaming. (While roaming, all traffic is tunneled back to the home carrier and blends in with their traffic.)
Of course, it's the most tedious VPN. It's also the most expensive. But what subset of traffic actually needs to go over the VPN? Like authentication and bot detection, these types of checks tend to be too expensive to perform on every request to every service endpoint.