I had read a paper or piece of research some time back that suggested a lot of Brasilian Transgendered women where not in fact Transgender. The research suggested due to the relaxed attitude to Transgendered people in Brasil and the more common desire for TS women from men that many Gay men will have cosmetic surgery (sometimes hormones) to become prostitutes.

There was also an elaboration on the term Travestis which, will be used a lot in Brasil being a direct translation of Transvestite.

Also on a side note I have known (personally) of Transgendered women being attracted to only women or other Transgendered females but all of those women I know are not interested in the adult industry in the slightest.