I am guessing one of the following things happen:
- scotty has written an amazing piece of code that can intelligently pick up the correct product image from the page or capture a screenshot if appropriate
or
- Mods/Power Users are in charge of choosing from a list of suggested thumbnails (similar to Facebooks URL sharing script)
or
- Said users must source the image themselves for every deal posted
Not sure if it's not meant to be public knowledge, I am just curious as to how the the thumbnails are always so accurate/appropriate.
Answer is
Foxshot