Each click on Amazon link is recorded as an event in Google Analytics with the following parameters:
eventCategory = ‘Spreadr Link’
eventAction = ‘Click’
eventLabel = URL of the Amazon product page.
To see Click Tracking reports:
Select Behavior > Events.
Drill down / explore events having Event Category = 'Spreadr Link' and Event Action = 'Click'
You can also see the click activity in the Analytics Real-Time > Events panel.