If they are 747-400 pilots yes they fly the freighter. If they are 777 or A340 or A330 pilots no they do not fly the freighter as the only freighters are 747s.
It is BS SOs never ever land.
Don't know but doubt it as the deal was they get housing I believe after being instructors in ADL.
Think you just do HKCAD exams but not 100% sure.
If you pass you pass.
Yes there is a request and swap system online.
Not a democracy, what the captain wants is what happens. That being said it is rare to go on a flight where it is not shared equally as most of them are not p***ks but they are out there.