How they do it?

I am doing a lot of manual thing on facebook for testing something. And found something interesting an adult picture and I wanted it to collect for my future use. But after saving the picture was different and it not adult picture it something else.

safe picture for fb and adult for public.

PureHustle said:

Simple - cloaked link.

Redirect fb crawler and fb IPs to safe link, redirect rest of traffic to adult.

Click to expand...

link are not clocked, only picture clocked.