Telltale Games are giving out codes this weekend, which I think are $10 discounts on stuff you buy.
Another reason to join Twitter is that we're not always able to break news as it happens, and sometimes you get one day deals such as $2.49 for Lucidity or The Secret of Monkey Island: Special Edition. Deals that LucasArts mentions on Twitter.
The real reason for this update, however, is to endorse the idea that you should follow the Mixnmojo Twitter account. Our Twitter feed is automatically updated by the magic of technology, using a mysterious method that scientists have agreed to call "amazing". To see the magic in action, follow Mixnmojo.
Which is a bummer, because I saw one 2 minutes after it had been posted yesterday and figured that it would already have been used.