I've got pop outs on my Jet Ranger. They're only supposed to be good
in seas up to about 2 feet. Personally if I did have to pop'em and the
ship stayed upright I'd be happy, but the real reason to have them is
that even if the thing flips you're near the surface and egress stands
a chance of being a lot less traumatic than it is in one without floats.

To answer your other Q. They can salvage the ship, but the engine
and a lot of other things are probably worth close to scrap.

The old chief flight instructor at Bell told me that more helicopters
flipped over when somebody tried to tow them with a boat than
after landing. I thought it was an interesting factoid, and it was
funny to imagine what the guys at TowboatsUS would say if
I called em up on channel 16 for a tow back to the airport.

Bart