Mi pare che qui ci sia spiegato il motivo:
Lexmark International announces is pleased to announce the new Z845 Colour Inkjet Printer: perfect for anyone who needs a sturdy, reliable desktop printer. Along with the introduction of the Lexmark Z845 inkjet printer, Lexmark is introducing the Return Program Cartridge, which gives users new choices for reducing their printing costs, including discounted cartridges.
Mastico male l'inglese, ma sembra che Lexmark/IBM abbiano deciso che solo "loro" potranno ricaricare le cartucce in questione
, penso proprio che abbiano inserito lo stramaledetto chip....
Ciao.