I often see sales letters that try to "borrow credibility."
My question is - where does someone draw a line?
Let's say someone is selling an email list-building course.
What would you think of the following?
1) Quotes from marketing gurus (with said gurus pictures) on the importance of building an email list (in general).
2) Mention big companies (with their logos for illustration) that use list-building (again, in general).
It goes without saying, the sales page would not falsely claim that those gurus or companies endorse the list-building product.
I feel that most gurus or companies wouldn't want their name to be used to sell someone else's product (flattering as the mention of their name might be).
But I could be wrong, because I often see this practice being used.
What do you think?
Thanks in advance for your feedback!