In an attempt to provide equal and fair experience to every one of our customers, we've introduced a fair use policy to limit potential abusers.
You can read more about it on this page, and find contact information at the bottom.
While you receive fully dedicated CPU cores, RAM and storage, network is one of which we can not dedicate to you - With it comes a fair use policy on port/bandwidth usage.
Each instance receives 7.5TB @ 125Mbps per GB of RAM, which once used up gets switched to 1/10th of the original speed.
If on average more than 50% of the port speed is used for 45 minutes or more, the instance may be limited to 1/10th of the original speed for up to 45 minutes.