Pirates refer to copies of Windows activated in this way as Pirated Genuine Microsoft Software. The total number of estimated sales including pirated copies range from 25million to over 100million. However, it continued to sell well in pirated editions. In November 2015, Udemy was accused of publishing and profiting from pirated courses. Its type library was also easily pirated, since fonts have only limited copyright protection. Many foundries cut (or, in many cases, pirated) their own versions. Hundreds of unauthorised, or "pirated", productions of "Pinafore" appeared in America. An additional motivation is that it may enable the installation of pirated apps. Jailbreaking, therefore, allows the installation of pirated applications. If a game is pirated a lot it will be bought a lot. The report also noted removals of music apps serving pirated tracks. Numerous parodies and pirated works have also appeared. Her fame had crossed the border, thanks to pirated tapes. Two people were arrested in connection with the pirated version. Most of the titles on this book club were pirated.