Commercial graffiti (also known as aerosol advertising or graffiti for hire) is the commercial practice of graffiti artists being paid for their work. In New York City in particular, commercial graffiti is big business and since the 1980s has manifested itself in many of the major cities of Europe such as London, Paris and Berlin. Increasingly it has been used to promote video games and even feature prominently within them, reflecting a real life struggle between street artists and the law. Commercial graffiti has created significant controversy between those who view it as an effective medium of advertising amongst specific target audiences and those who believe that legal graffiti and advertising using it encourages illegal graffiti and crime.