Another day and yet another way to promote digital distribution of music. Today's Grouponicous Groupon is pushing a full download of Rihanna's new album, "LOUD", for $5 (50% off). While the record sales may be losing money from the discount, the very popular daily deal site sends such deals via email to millions of subscribers so in essence that money comes out of the marketing budget (see the $11 million Gap Groupon story). It will be interesting to see how many more album sales this adds to Rihanna's first week. A similar price-scheme for Arcade Fire's last album on Amazon led it to be #1 on the charts in its opening week.