I worked for a company that did this. As an employee, it was pure hell. We charged a flat-rate per company and as a result, people would call us every day for

I worked for a company that did this. As an employee, it was pure hell. We charged a flat-rate per company and as a result, people would call us every day for problems like "please move my icons from X to Y". To make things worse, my boss never scaled the company properly so we had 5 employees managing 50+ companies, which resulted in hellish work conditions.