Some software is being developed in such a way that they are always Tethered to a server on the internet in order to function. If the server stops working, the program becomes obsolete. Unless the server's software is published in such a way that anybody can host it, this kind of Tethering is malicious.
This comment thread is for people to document various implementations of this malicious feature.
When I started with Dani's Race I thought that the extend of my programming will be something like dynamically changing the speed of a car and maybe loading and unloading certain things on the map based on the distance from them. But quickly it became a mind-field of math and other programming cleverness. About which I will talk to you in this article