Kapusta:”If some music, book or software program is no longer offered for sale, you know that you would not have purchased it if you didn’t copy it, so there’s no issue of hasagas gvul.”
I once read an interview of a famous Frum singer in one of the Frum magazines. He spoke about how it really bothers him that people constantly copy his music and that this has caused him a TREMENDOUS problem parnassah-wise. He also mentioned that many people apparently have no idea that it’s a problem halachically and financially because his friends and acquaintances will just mention to him casually and innocently that they copied his music.