We're as confused as you are.....the 25% ones indicate you have to use "LIVE"...which costs over twice as much, before the discount is applied..so read the email carefully...if you upgrade to LIVE Deluxe..you may end up paying slightly more even with the discount, and then end up not using the LIVE service either..
(Really would like to see someone post a picture of the 50% email so we can see exactly what it says.)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*