Just wondering... as example the popular "3 week diet" campaign...
It depends what they claim on their website.
Facebook wants to assure good user experience so as long as your ads and landers don't break their policies you'll be fine...
depends on what is in the offer page itself, terms, conditions etc, facebook is all about the user experience they don't care about advertisers or affiliates.
It depends on how theyre advertised
Generally, no.