Actually a good sex worker will never have any risk get caught by police.
Because if she provide quality service, these returned customer will bring more customer to her automatically. She don't need to put ads on the wall or newspaper to catch the attention from police.
Like here in USA, Los Angeles County may have most sex worker among all the big city in USA. But it is still very rare for police to raid. Just go to Hollywood Blvd, there are streetwalker every night.
Some of them even are very familiar with police.
I don't know why. But it seems like a real harmonious society.
