We like this standard introductory offer from The Boston Globe for the simplicity of its design and copy. Notice that it avoids special characters in the subject line by using a "c" instead of a ¢ sign. The images and button copy make it clear that the offer is for comprehensive digital access. And while we would have preferred a button above the fold, The Globe's testing expert Natalie Bean told the audience at Subscription Site Summit that the button actually performed better below the fold. O...