Gastric bypass is an enforced crash diet, because the stomach is so
small that the person can only eat very little.

That's what I thought too, till I read through part of this girl's WLS
journal just out of curiosity. There she says things like: " but don't
understand how in the world I was able to eat so much only 8 days out
from
surgery..." She cheated on her liquid diet a few times WITHIN THE FIRST
FEW
DAYS after surgery. From what she says, even after surgery it wasn't easy
to
stick to plan. It would appear that many people think that, just by
having
the bypass, they'll automatically eat very little without any effort or
willpower on their part. According to this girl's story, that's not the
case.

I am confused, was she losing weight slowly (which would suggest that
she really ate more food than I thought), or was she losing weight
quickly, while feeling as though she was eating a lot?

Lost weight quickly over the first couple of weeks despite little cheats but
then hit a plateau after 4 wks or so, then lost slowly for a while, 1-2
lbs/wk, which is OK for people of moderate weight losing without surgery but
she was still over 300lbs. She definitely had trouble adjusting to eating
less even after surgery, although there were also times when her stomach
didn't let her eat much.

Was there something wrong with her skin? Did she not exercise?

Exercise wouldn't have done anything to the lose skin, you may develop
muscle mass with exercise but hardly enough to fill that empty 'sack'.

Absolutely.

I do not think that there is anything you can do, besides losing
slowly and making sure that you eat a good diet. It is supposedly
better in younger people. I have not seen any supplements that would
be proven to work. Which is not to say that some magic solution does
not exists, only that I have not seen it. I had a lot less to lose, I
lost only 50 lbs, and I personally do not have saggy skin.

The mechanism of skin elasticity and loss thereof, is that as people
age, sugar bonds with collagen molecules in skin, causing them to
cross-link and become less elastic. So, if a person is old and had
high blood sugar, they would be more likely to have saggy skin.

The girl in the pictures was 33 yrs old when she had the bypass.

Looks like she is one unlucky 33 year old...

It was an eye-opener, I never thought about this 'dark' side of losing
weight. Seeing that is certainly a good motivation for anyone to stop
gaining weight, knowing that even if you manage to lose it you may not look
as good as you'd have expected, unless you have plastic surgery (and big
scars left after it) ;-(