Previously, Rupture was a static damage finishing move that offered the same DPS no matter how many combo points were saved up—additional combo points only extended the duration of rupture. The prevalent strategy was to gauge how many seconds left your target had to live, and to only use enough combo points to match it. However, Rupture was overhauled to improve its scaling and make it a more attractive ability for end-game use. This change was later reverted, making the DPS the same regardless of the number of combo points used.
Patch 7.1.5(2017-01-10): The damage of the spell no longer scales up based on combo points spent. Now, combo points spent scale up its duration.
Hotfix (2016-08-22):Rupture damage has been decreased to 25% Attack Power (was 30%).
Patch 7.0.3(2016-07-19): No longer available to Subtlety rogues. Damage increased by 327%. No longer deals additional Nature damage or grants Energy to poisoned targets, nor causes the rogue to gain additional Energy if a target dies with Rupture active.
[Venomous Wounds]'s effects have been merged into baseline Rupture for Assassination Rogues. It no longer triggers from Garrote and now always triggers when Rupture deals damage (up from a 75% chance).
Patch 3.3.3(2010-03-23): The damage-over-time component of this ability can now produce critical strikes.
Patch 2.4.0(2008-03-25):Skeletal and non-corporeal undead (such as wraiths), elementals and mechanical creatures are now susceptible to bleed effects.
Patch 1.12.0(2006-08-22): Rupture now increases in potency with greater attack power.