As eljefino pointed out, that's just a way to get around spam filters. In most cases, the body of the e-mail will be grammatically somewhat-correct gibberish to make it look normal with a graphic included at the top that contains the ad. Most spam filters will evaluate the words and assign a spam probability to each of them. If the overall probability exceeds a certain threshold, the e-mail is tagged as spam. Putting a bunch of spam-neutral words in the body of the message lowers the overall spam probability and helps ensure the target sees the message in his inbox. The latest trend in spam, now that the filters are starting to wise up to the gibberish, is to eliminate the text and just include a graphic.