Lets analyse it a bit more:
A short good news for the S2 buyer is that we will let the S2 to upgrade to 1.8TH/s or 2TH/s at very low cost which you can only image now in the August or September. It still depends on many factors to let us achieve that and detailed plan needs to be drafted, But we are very confident that we can make it.
-"upgrade to 1.8TH/s or 2TH/s at very low cost "
I believe is more like a hardware upgrade, rather than a coupon.
Well they better start moving faster as diff will ne 10.4b next week.
But then again no one else has a better $ per gh solution either.