Some kind of mistake
Here is a cute idea. A self promotion for a proof reader. The pencil is mostly erasor. Interesting juxtaposition. I wonder if the person who thought it up had the idea as a by-product of another task - then thought: "This is too good to waste…I'll find a proof reader…to adopt it."?
Nothing wrong with that. People with ideas for business look to have them sponsored by venture capitalists. Maybe advertising agencies need to present more speculative ideas to businesses - those who are already clients and those who aren't. That way you get a proprietary advantage. You don't need to engage in competitive pitches because no-one else can implement your idea - unless you license it to them. Has anyone thought of a licensing model for advertising?