No one said she was doing strict pullups. Its not different than people bouncing a bar off their chest for bench reps or the stupid 1/4 ROM shoulder presses. Its about doing the movement fast...its their competition.
(Brian, you couldn't do 15 strict pullups in good form anyway, so fuck yourself...I saw yours and your 'I' taper back)
Also, its not 'goodbye shoulders'. Does anyone say that to a gymnast on bar or ring movements? Nope. Those are butterfly pullups. There's kipping pullups as well. People want to laugh at these, I laugh at most bodybuilders doing what they think are pullups and they barely get their foreheads above the fucking bar yet its 'damn bro, that's a good set'.