If you are a top notch, worldwide known photographer, it is very likely that customers from all over the world will want to use your services (for fashion, events, sports, architecture, products etc.). But as we are focusing on travel photography, commercial organizations that deal with traveling and tourism are more likely to hire you. Notable examples are hotels, tour companies, airlines and so on.
The Lower Omo River in south west Ethiopia is home to eight different tribes whose population is about 200,000 and it is there that they've lived there for many centuries. The tribes such as the Daasanach, Kara (or Karo), and the Mursi live along the Omo river and depend on it for their livelihood. The annual flooding of the Omo River feeds the biodiversity of the region and guarantees the food security of the tribes especially as rainfall is low and erratic.
Similar to geishas, the "sing-song" girls (also known as 'flower girls' were trained from childhood to entertain wealthy male clients through companionship, singing and dancing in special sing-song houses. While the practice of concubinage was officially made illegal, it has recently been popular amongst the wealthy in China as a result of the country's prosperity.