Hi Glyco,
I must apologise for the article I originally posted as someone has already pointed out, it was dated 2014. The SYN world has probably moved a lot since then with sponsored content providers moving in/out during that period, which is why we haven't hear GG talk much about Amazon, eBay etc.
Therefore, please take with a grain of salt (or at least notice that this may be outdated).
Cheers.