Amazon.com Amazon does not honor their affiliate agreements Internet

Two months ago I decided to make a large purchase and wanted my designated charity to benefit. I could shop through iGive.com, which would have resulted in 2.8% of my purchase being donated, or I could use Amazon (who I hate) who stated they would donate 6% of my purchase to the charity. So reluctantly, I clicked through the charity site to Amazon.com and made my purchase. followed up with the charity... no donation. followed up with Amazon and they responded that my cookies expired during my session and they would not credit my purchase to the charity. They were able to determine that I had correctly gone through the charity's website to their site, but refused to honor the agreement. It leaves me to wonder how many others, in good faith, have purchased this way thinking their charity benefitted, when in reality Amazon manages to "expire the cookies" so that no link is made? I will NEVER use Amazon again.

Crazylu
new york, New York
U.S.A.