Thanks! Well... mostly the copycats are Chinese, companies that makes injection moulds out of your design and fabricate it massively. If you actually succeed in prosecution, they will close the company and open new one with the same people, machines, location the very next day. They may even not change the name. It's impossible to get to them. For example... they took my Stinger design and copied it (badly?) and make hundreds if not thousands copies. They didn't even reply to my mail (manufacturer and reseller). https://imageshack.com/a/img923/9914/DHFEaJ.jpg
Thank you for donating - it really helps me going with future hobby projects!