Does Facebook allows Email/Zip submits?
The email/zip submit offers you find on most networks will generally be non-compliant on the basis of MyWoT rating (and if not they will get there quickly).
That aside, FB is touchy about collecting user info and can smell an email submit a mile away - everyone can...
You can still run these offers but, unless they are reasonably legitimate, don't expect your ads/account to last too long.
I wouldn't suggest running them, first because you will get your account banned if not super legit and second is that is very hard now-days to find email submits with a lower scrub rate.
I would focus on other niches.
I run very succesful email submits in germany.. But I use a post engagement ad and a bitly link..
I've been running them for four years on the same accounts. I think you can make it work if you're smart about your setup. Who's to say your ad even needs to promote the offer? If you can optimize your ads and get passionate fans on the cheap, you will be fine. Hopefully. Be imaginative and find a good niche.
Don't quote me though. 