Ultimate free lunch ?

[lilphil1989]

The net mass/energy removed by black hole from the universe outside its event horizon over the long run is ultimately exactly zero.

Isn't that a tautology, at least from the point of view of an oberver outside the event horizon?
Because nothing ever passes the horizon anyway, just accumulates at the surface.

[Anomalocaris]

The net mass/energy removed by black hole from the universe outside its event horizon over the long run is ultimately exactly zero.

Isn't that a tautology, at least from the point of view of an oberver outside the event horizon?
Because nothing ever passes the horizon anyway, just accumulates at the surface.

Good point. However, what I meant to say was the event horizon continuously shrinks and ultimately disappears, thus nothing remain remains with the blackhole forever.