Groupon Email Spelling Error

I received my daily offer from Groupon this morning and discovered, in addition to '74% off Laser Lipo', I could also purchase "Collegen" face masks. As you will see, 'collagen' has been spelled incorrectly. This spelling mistake is on the email header, the first thing everyone sees when they go into their emails - bit of a mistake there!
The word is spelled correctly later in the email however, showing that this is probably just a typo- either that or written by two different people with different views on how to spell this word :)