I do rent from Hetzner and OVH. Before signing contract I emailed them and asked if there are ANY limits / throttling beyond their unlimited 1gbs. They assured me in writing (email) that there are none. Some of my rented servers host giant 4K high video files and transferring those which happens all the time keeps that bandwidth pretty occupied. So far I did not see them impose any throttling. Not on my business anyways.