I have seen many so called new versions of WinMx on the Internet. From what I recall there where and still is a lot of programs being called WinMx and even claim to be an upgraded version on the old Client. The programmers know that WinMx was popular and still is. They also know that some users are underknowledged and don't know WinMx is a FREE program.
They use pay for this new version, unlimited support and various other tatics so that people who are underknowledged will part with there well earned money.
Technically it's fraud as i am sure Frontcode does not make these new versions and I am more than sure that the clients do not use the same WPN as we all know it. The problem we are faced with is that of no one taking these people to court for fraud. Lets all think about it, in court for copyright breaking of a program that allows users to break copyright.