Hello everyone,
I’d like to present a pic. at first.

Budget: $8
Bid Type : CPA
Bid : $3.98
Location : USA
You may don’t feel odd, but check the pic.
Results(Website Clicks) : 4158
Cost : 0.00 !!!
I guess you guys all know the meaning of this.
Spend:$ 8
Payout: $0.5
CR : 14%
ROI : 3000% + !!
After long-term testing. That only with low CPA and large budget !
Keep in mind that the budget cannot be too much.
I guess you guys all know how to make money.But please stay calm, don't let Facebook found this BUG too early
I’m willing to share the experience of adverting on FB, these must be valuable for u. And I hope that you don't skimp on your experience.
let’s work together to make more money 
Check your PM mate!
You can have a try ,It's really very Exciting .
>_<
Posting about an exploit is usually the fastest way to get it plugged.
I take it you're bidding CPA, but for what - link clicks or app installs?
I'm a bit confused - you say low CPA ($4 isn't low CPA for an app install...) and high budget (but you spent $8?).
Pm sent.
This is nothing really new (I thought,) but not very scalable.. It seems as if FB sends very high quality traffic at first as a way to grade/gauge your ads after submitted - so maybe by keeping spend low are taking advantage of that. But for me, it is not feasible to do this on a large scale via duping.
I'm confused though as to how FB is charging link clicks on a CPA basis, but not actually charging them.
Perhaps its due to the bid being very high and the budget being very low or something.
Is this for a Newsfeed Ad, the new Right Hand Side Ads or something else?
:O:O
In any case, I wouldn't rely on bidding exploits on FB for anything sustainable.
They will fix it and it will be all for naught with account bans to follow.
My hypothesis is that if you bid a very high CPA bud budget low, the algorithm delivers the ads but then can't charge the ad more than the ad group budget > click happens then charge fails > keeps happening.
Easy to conceive of if the algorithm hasn't considered this possibility, and if you can force non-ideal budget/bid combos through the power editor.
However OP suggests the opposite. Not sure how this would work. Even if you bid $0.01 CPA and budgeted $10,000, not sure why the system would even deliver impressions to a $0.01 CPA advert let alone not charge you for it.
^^ This will not be fixed, it's been the case for 2 years. It's not a bug. Great quality traffic to entice new advertisers. Very few duplicate clicks.
Increase the budget and things turn sour.
That's why everyone who starts on FB gets excited about these earnings at first. With a big enough audience and low-budget campaigns targeting exclusive groups, you can string a few together and get great ROI. I haven't had ROI like this though, but 500-1000% was not uncommon when everyone was doing 100+ $5 campaigns on dating until the start of this year. My first $500 profit day was just duplicating a $5 campaign with the same image a ton of times (changing 1px every time on the image). Same targeting even. The equivalent big-budget campaign did not do well, it had to be smaller budget campaigns.
This 'loophole' (it's not, it's simply a loss-leader, like a supermarket selling milk at a loss in order to ensure a shopper comes in and spends $100) will exist as long as the inventory is there. It's stopped for dating+RHS because RHS impressions are less than they were. And it doesn't quite work with NF on desktop as you get banned before meaningful profits are truly realised, better to push for better total profit as opposed to ROI.
With this sort of ROI there could be an exception. The right offer, traffic etc. can work well, I hope this lasts for OP for a long time indeed. I would recommend OP change his image to take out his FB Page name, or some jelly affiliate might cause some trouble.
To clarify, OP is being charged and is getting sub-cent clicks, like has been reported many times on this forum. It's real.
I can understand sub-cent clicks and everything you mentioned, but his total spend says $0.00... which would mean he is getting clicks for <$0.00001 or thereabouts. Surely not?
And @ OP, yeah I would change your image to blur our page name and ad name - both can be tracked down to you so not worth revealing on a public forum.
why wouldnt you just bank xxx,xxx+/week with this exploit instead of telling the world? something seems fishy
you put a lifetime budget of $8? Over what time period?
Also I see you are bidding CPA, can this be done with oCPM too?
hello, love to know this.
been paying too much for facebook, time to get some back):
As far as I know, this bug has been fixed already. You cannot change the bidding type to CPA for website clicks anymore. Correct me if I am wrong.
Is this bug banking on the fact FB can't stop the traffic before the budget is hit or the campaign ends?