If I get an ad approved with a lander and then change the ad later, will they check the ad at a later date to ensure ad quality.
Answer:yes
so bait and switch does not work to well, oh well try something else then
Well depends on your ctr if its high they will recheck it, what are you switching it for?
Thats what they make cloakers for 
Also certain ad copy has a much higher retroactive review rate like diet, skin, bizop etc
Yes, facebook check ads even if are paused. Happened to me, all my ads where paused and I received an email with notification from facebook that my ads are against TOS.
Yes! Don't do the bait and switch unless you're willing to risk your acct.
Ryan,
I also posted a message about this in the EWA Facebook group. What do you advice to do with International offers. For instance Be2 belgium. I have to use be2.be first because FB appr team cannot see the offer page. But after approval I switched the url in prosper...ads active for a few hours, and after a few hours...dissaproved.
The only thing I can think is sending the traffic to my own website first?
When I run intl offers on facebook I use the AffiliatePlex cloaker - you show the real visitors your aff link and you show the reviewers the actual url of the offer. This way no matter where they are in the world they see the right page, and your users clicks still get tracked through the affiliate link. That's the best way to do it really. It's actually what the cloaker was made for, according to the guy who made it. Go figure.
The advertisers/networks should make the links viewable from around the world. I mean, if the offer is for US only, and some dude signed up from Mars, who cares, just scrub that from their back end. Why put the burden to us affiliates, forcing us to do stunts risking our FB accounts. WTF.