Facebook was a real gold mine 3 months ago...
About the daily limit, you can just run multiple accounts until you get a correct limit. I use 3 accounts since months with the same credit card, never had a problem even when I contacted their support to whine againt their approval policy.
Btw, if you want to stop running a campaign, put your bid at 0.01 instead of pausing or deleting it. Pause/delete can be effective more than 1 hour after you effectively did it (meaning you are paying for trafic ofc) but bid changes are recorded in less than 10 mins.
All in all, facebook ad model is really interesting (compared to other ppc), it just became very very expensive after being very very cheap. Profit is still possible though. It was really crazy 3 months ago, where you could target whole US pop and get thousands of clicks per day @ 0.10 or less =)
Last detail : human review ONLY happens when you launch the ad. I replaced the destination page of some of my ads weeks ago, never had a problem even if the new destination page would never ever pass the initial approval process. So, let's say you want to direct link to a zip submit.... just put up a landing page (snapshot the real page, photoshop it to remove the form, put that in a page, approved np), launch 10x the same ad (more trafic, more chances to get one with good ctr), replace your lp by a 301 redirect once approved, profit.