It's hard to tell the exceptions from the rules. Many people would say, e.g. don't deal with large companies because they will drag you along, eat your revenue

It's hard to tell the exceptions from the rules. Many people would say, e.g. don't deal with large companies because they will drag you along, eat your revenue and then not commit to a sale 12 months later. You will also find plenty of companies who will say that 1 big customer was their route to some early cash and success. The bottom line with any business success is the CEO/executive team understanding how to take a high level view of the company and fix anything that isn't working!