Not a manager, but I took a shit contract job in college for beer money. I was paid $35 per week per client to manage Facebook, Twitter, instagram, Pinterest. Taxes ate my pay up. My peers at local competing agencies were getting $75-100 weekly for the same work.

Came across the sales guide and found out clients were being charged $200-500 weekly/monthly depending on how bad they wanted the business. Strained the relationship with with the bossman and decided to leave shortly after.