Watch on Soap2day. Advertising in letterboxes is an opportunity to do some good business. Especially for the employer, when they're delivered by an employee who's paid every other hour. To find out how almost 40,000 distributors give up working hours for their companies, take a look at our undercover team at Adrexo. In the distribution centre, the management office and even at the Ministry of Labour, employee rights are clearly a little too complicated.