Pros
They demand an exclusivity agreement from you, but they never raise your salary. There are no promotions or any kind of perks/benefits for the employee.
Cons
They hire inexperienced people, give them a higher rank and double the salary, but you're expected to do their job for the good of the company.
Someone with no experience gets hired, is given a better title and double your salary, and then you're stuck doing their work for the sake of the company.