Hey guys,
i want to cloak FB pixel.
According to my understanding, I should place the FB pixel on my thank you page(safe page of course).
And I should iframe that safe page on my affiliate network, right?
If so, how should I iframe it on HasOffers platform?
I tried to <iframe src="safe-page-url"></iframe>, and it didn't worked.
Please help
Is your safe page HTTPS?
I believe both HasOffers and Cake need your URLs to be HTTPS for the iframe.
Not an expert, but perhaps that may be the issue?
Would appreciate if others can chime in too.
Any more ideas ? 
iFrames are pretty simple code.
Other than the HTTPS possibility, if it doesn't work I would first consider whether you even can place an iFrame (I presume the offer explicitly lets you place HTML/JS code, yes?), and if you can, whether there are any other specific limitations coming from the advertiser.
For that, ask your AM.
If you can choose, always work with a global postback (S2S) instead of an image/iframe pixel (C2S) as S2S is more accurate
If only FB offered S2S 
On FunnelFlux there's a feature wherein you can configure it to fire a pixel back to your traffic source (supports JS) when it receives a postback from your aff network.