I found this to be interesting and wonder how come they don't offer this to customers in the United States? I mean i wouldn't mind a free speaker, would you? I was going to post a link but the site won't let me so i guess this is the next best thing.
Free HTC BoomBass with HTC One (M8)
Terms and conditions
1. Free HTC BoomBass with every purchase of a HTC One (M8) when bought at Vodafone Limited (“Vodafone”) either online, in-store or via telephone (the “Offer”)
2. Offer only available to residents of the United Kingdom aged 18 years of age or older.
3. Offer only available whilst stocks last.
4. Valid for purchases from 26 March 2014 to 7 May 2014 inclusive.
5. The last available date for redemptions is 4 June 2014.
Why doesn't HTC offer this promotion in the U.S?