Press Release or Spam?

Scanning my e-mail includes the compulsory activity of deleting spam on first sight. It's second nature. Which is why when I was scanning the wires a press release with the title "1,600 Per Cent Increase in Revenues Could be Yours" made me go for the delete button. Maybe you've got a service to sell, but the first step the marketing guys at this company should have done was to make the differentiation between the pitch and the multitude of spam. How is this different from the pure junk titled, "Play and make big money.," "Develop your business using our company MHII.OB now" or simply "reputable" I'm about to trash from my e-mail?