Kenji is correct. An image uploader cannot earn from Tinypic. It doesn't have an affiliate program. People here have been using Tinypic for many, many years and they can attest to that.
Nagkamali lang (or tinamad) ang threadstarter. He copy-pasted direct links to the hosted images' pages instead of the ready-made code for forums with the [IMG] tag.
But the threadstarter should have afforded the members some courtesy by describing the item he is selling in his post, instead of merely naming the price and adding photo links to an item which would have remained unknown if the viewer did not click on the said links. The way the post is written, as well as the lack of the aforementioned tags, just speak of plain laziness.