Most providers will just try to control specific sites to save on bandwidth. If they did it to all sites then they couldn’t claim they have X speed. They’ll even try to give extra bandwidth if you go to well known speed testing websites.
When going through a vpn, they don’t know what websites and data your requesting, so it’s outside their parameters they have set up to throttle.
Why does tmobile not throttle your traffic when it’s running through a VPN as well?
Most providers will just try to control specific sites to save on bandwidth. If they did it to all sites then they couldn’t claim they have X speed. They’ll even try to give extra bandwidth if you go to well known speed testing websites.
When going through a vpn, they don’t know what websites and data your requesting, so it’s outside their parameters they have set up to throttle.