This is what we like best about Amazon. No strings attached to the use of the materials. This too is very important. You've got more important things to do than go searching for your sales data in their website. If they won't send it to you, then they're probably configured to add your visit to their hit meter, and NOT set up to servicing your individual account.
Some sites only accept charge cards, and then omit some cards.
Some corporate and education buyers can't use a charge card. So their sales would be blocked. Check to see if they offer alternative ways of paying for the merchandise. . This not only serves to keep you in the know about new products or special promotions, but also serves to indicate that they are aggressively supporting their associate network. . Further Thoughts I think if you ask these questions, and read their fine print, then you'll do okay.