Marked for Death and "Cannot Gain Stealth"

[LowTierSteve]

When Marked for Death is played onto an enemy character, the card states that the enemy "cannot gain Stealth".  I'm a bit confused by this choice of wording - this sounds like a character cannot have the Stealth superpower added to it (through the use of a Tactic card or another character's superpower/leadership granting it Stealth, as examples).  Is that the intended meaning?  Or is this trying to say that characters who already have Stealth on their card as innate superpowers (e.g. Black Cat) cannot use it or gain the benefit it provides?

[Negoldar]

The first effect of Marked for Death is that a character with Stealth will lose it.

The second is that it cannot gain it through effects like Dark Past.