Nicht ganz.Schau mal wie sie der Begriff auf der Seite selbst definiert wird.
Wikipedia: "Abandonware is computer software which is no longer being sold or supported by its copyright holder. Alternately, the term is also used for software which is still available, but on which further support and development has been deliberately discontinued." Since the software is no longer sold or supported, the copyright holders are not directly harmed in any way. This is why abandonware sites are, for the most part, ignored by the law. The distribution of copyrighted software however is, and will allways be, illegal!
Gerade die Lucas Arts Produkte werden immer wieder noch neu aufgelegt oder erscheinen auf Compilations.