@ins0mniak he's correct in that VPN detection is the fundamental problem here - it sort of defeats 50% (not all) of the purpose of a VPN, which is that you can use the internet "as if" being a regular user, and NOT use the internet as a "marked" user, that apparently everybody can easily recognize to be a VPN user, and then be discriminated against and sanctioned for being a #VPN user. Gab is just one a**hole that makes use of this detection, unfortunately others use it too, Reddit is one I believe (but you can use with an account) and 4chan is another (you can't post from a VPN unless you pay for their gold account or what it's called).
He is wrong with saying Proxies would be any better - no, these will also be flagged as "VPNs" because they treat any IP coming from the cloud as a VPN I believe, so only end user ISPs work and are "not VPNs" in their thinking