Anything in the forums (there’s a discourse addon) or in the ‘where to find’ section in Natively will auto add my tag at the end of amazon urls.
I guess if you put an amazon link in a book review on the site, I don’t catch that… but yeah it’s mostly auto appended!
Do note though that while this does generate some welcome revenue, we are still not making the big bucks here… still very much a negative income enterprise at the moment 
one day…
