It seems like a good way to retain some interest in the X1 now that it's been out for 20 months.
It also seems like a good way to get people enthused about daring to install the next version before a hot patch comes out. :-)
In any event, It would be a bummer to buy, or have bought, the package after July 1st 2012 and learn that you were not aware of the rebate until it was too late.
Seems like it's time to get the word out.
best,
mike