Blizzard are being very generous and are fixing an issue that occurred earlier in Season 5 by rewarding all players!
Several sources of guaranteed Greater Affix legendaries were not actually giving them as promised for a while in Season 5. The issue is fixed now. But instead of simply giving affected players the rewards, Blizzard have opted to shower everyone in GA legendaries! Now, some players that did a lot of Infernal Hordes while the issue was present may not be properly compensated, but this is better than nothing for them, and a very nice surprise for everyone else.
All players will receive a cache of Legendary items with guaranteed Greater Affixes, to make up for the issue seen with patch 1.5.0 where players were not getting items with guaranteed Greater Affixes from multiple sources.
Hopefully all future issues can be resolved by giving everyone some cool stuff! Ashava’s Horn for all next, please!!11