Sell on commission means in the old days with real paper books:
Go to a bookstore. Bring them 5 books, make the proposal to sell on commission with 40% discount.
Go a month later to the same bookstore. Only 1 book left in the store.
Write them a bill 4 books 40% discount.
Ask to fill up for again 5 books.
I have a similar idea for selling e-books.
Somebody wants to sell my book to personal friends. He is not sure how good he is as a seller.
He gets from me 20 voucher codes for downloading my book.
One month later, I see that 5 voucher codes are used for downloading.
I sent him a bill for 5 books with 40% discount.
The point is, that he sells his friends direct a paper with the voucher code printed and takes the money.
"I will go to Your homepage, click on the link and will purchase the download" will not be done in most cases.
So it's better to make the deal immediately happen by exchanging a paper with the voucher code against money.
What tools has E-Junkie to
1.) Assign an affiliates voucher codes
2.) Check all voucher codes assigned to an affiliates for used or unused