Beast's source and plugins where sold, the author also claimed that for the right price you'd get new functionality to an undetectable variant. Netdevil or whatever the name is... a version of that was sold as a commercial product. BO plugins have been sold.

Gaobot and SDbot had a GPL for **** sakes...

GT(-ish) bots basicly consist of nothing more than commercial software, scripts to make the program do what you want, and a few registry entries for startup and to register the program... the only thing really considered to be malware is the wrapper that compresses/drops all this ****. They are often commercial software also.