Since the 1980s, it has become common for talented dōjinshi creators to be recruited by professional companies and become popular on the mass market. Many famous artists have had a past in the dōjinshi scene or are still involved. Artists—including Ozaki Minami (1989–91, Zetsuai) or CLAMP (2003–9, Tsubasa: Reservoir Chronicle; 1992–present, X: 1999)—became famous in the dōjinshi world before conquering the professional market, and artists such as Koge-Donbo (1999–2003, Pitaten) and Hiroe Rei (2002–present, Black Lagoon) are still very active, regularly selling dōjinshi at fairs. Dōjinshi like Masamune Shirow’s Black Magic (1983) or Minekura Kazuya’s Saiyuki (1997–2002) were directly converted into popular professional works.
Professional artists selling dōjin products on the side have been a common practice for a long time. In the summer of 2004, 5 percent of all circles participating in Comike were headed by a professional mangaka or illustrator, while another 10 percent had some professional experience. Similarly, it is common for erotic game producers to allow their underpaid artists to sell their drafts and sketches as dōjinshi, giving the artists a second wage and the company free promotion.
[QUOTE] From Fan-Yi Lam, Comic Market: How the World’s Biggest Amateur Comic Fair Shaped Japanese Dōjinshi Culture, p240-241