He was charged with fraud on several occasions for selling lists of the women who signed up for his service to men who were looking for prostitutes.[162] Dateline existed until Patterson's death from alcoholism in 1997, and during the early 1990s it was reported to be the most profitable computer dating company in the world.[162] In the early 1980s in New York City, software developer Gary Robinson developed a now–defunct dating service called 212-Romance which used computer algorithms to match singles romantically, using a voice–mail based interface backed by community-based automated recommendations enhanced by collaborative filtering technologies.[6] Compatibility algorithms and matching software are becoming increasingly sophisticated.[7]