http://www.bbc.com/news/uk-43784251 BBC article on # #  I'm trying to work the numbers out.  
The property owner says he make £60,000 per year ( before tax). 
The price is £70 per half hour ( split £25 for owner, £45 for worker)
The shop supports  15-20 workers
So that is 60,000/25  = 2400 (1/2 hour) sessions a year
Total Income for workers = £ 2400*45 = £108000
Max mean income for worker  = 108000/15 = £7200, or approx £140 per week. 

That's a long way off the "I'm making £900 a week" the worker in the article says.

The only person making a living is the pimp ?