1. Not a good idea in my opinion. 2. Large companies would prefer to be pitched on the value of your site than to have fake profiles setup in their brand image/

1. Not a good idea in my opinion. 2. Large companies would prefer to be pitched on the value of your site than to have fake profiles setup in their brand image/likeness without their approval. 3. You could create a fictions profile of a company that doesn't exist as a demo of how your service works to help them visualize it being them.