I had always much fun with Alexa data.
Last time, somebody claimed he will have next year 50.000 EUR pro month from advertising at his internet project.
His Alexa data showe about 5% of my current traffic.
So he wants a 500 times higher eCPM, because my 20 times higher traffic earns only little bit above 2000.-EUR a month.
Great was a request for SEO work.
I found that they claim huge visitor numbers at the contact info.
I answered the estimation for SEO work
"After a half year of hard work, we will reach the visitor numbers, You are claiming just right now on Your site"
I did not get the order, but the vistors numbers vanished from their site :)