The boatman informed us that earlier they would be hired and payed a fixed amount which was later changed to getting a share of the ticket ; they welcomed the change thinking that it would lead to earning more but later realized that their earnings completely depended on the tourists who were very seasonal . Now they make the extra money by offering to deviate from the standard route , and taking people through a few smaller waterways and a longer route . Fishing was already underway at various places along the path we took . First were the kids trying to catch fish by the shore with their threads and hooks , storing the caught ones in a water bottle .

Generate a question about the above context.
What may be the reason why the fishermen changed how they made money ?
Available options: i. So they would make more money . ii. So they would be able to save customers money . iii. So they had to work harder . iv. None of the above choices .