Rate Suckers were a bizarre humanoid species that latched onto human vehicles in an Undefined Multiverse. They did so with the use of their mouths, which acted as powerful suction cups.
They were seen as objects of pure terror by the Humans of this multiverse, who would try their best to get rid of them in many ways.
Fortunately, it was possible to get rid of them quite easily through the use of a Progressive Snapshot. Why all humans did not utilize said device is unknown from outside the context of their multiverse.