As someone who loves marketing, this is like heaven for me
Oh...and the little "slipup" with Sebastian's name definitely was on purpose if not an industry standard. Swedish House Mafia has a huge fanbase that doesn't exactly listen to Britney, so the exposure and interest from new music appreciaters is definitely win win.
Reminds me of how they kept drumming up the dubstep and various top-notch dubstep producer rumors before FF, and it got a lot of Dubstep focused boards incredibly excited and writing lengthy essays on Britney and what it meant to their genre going mainstream, etc.
Not to mention, Sebastian got Billboard to write up on him about Britney's song. Win.