Most of the cheap "copies" are not copies at all though. They are Iterations on the idea like Prusa was an Iteration itself. Most people when talk about copies

Most of the cheap "copies" are not copies at all though. They are Iterations on the idea like Prusa was an Iteration itself. Most people when talk about copies talk about products like Creality Ender whihc in fact has so little or nothing of Prusa Designs. The frame is completly different (Extruded Aluminuium profiles vs Single piece cut) the movement guides are completly different (Rollers on V Aluminium profiles vs Rods with bushings, The Board is based on Melzi vs Rambo, The Extruder is different, the sensors are different etc etc. The only thing in common they have is that they are both Simple Cartesian Systems with a fixed Z Bed but this was not something that Prusa Invented. Nothing on these systems (maybe with the exception of the PCB Heated Bed) is an original Prusa Idea. Prusa's Problem is not that they are copying his design, it's that they are Iterating and often improving faster and cheaper than Prusa and these improvements are not given back to the open community, howevere for every "closed" improvement there has been, the community has found open alternatives.