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Guaranteed Paid Book Sales or a Prorated Refund

Every book promotion for $0.99 books comes with a Guaranteed number of sales. If you don't get that guaranteed figure you get a prorated refund in store credit. If you buy a $100 slot and get 75% of the guaranteed paid book sales, then you get 25% of the money you spent ($25) as store credit

It's very unlikely you'll require a prorated refund

92% of $0.99 book promotions hit the guaranteed figure or exceed it
95% of $0.99 box set promotions hit the guaranteed figure or exceed it

In the rare case your book misses you get a prorated refund in store credit. The store credit never expires. You can use it with the same book or with another book

Please Note: There is no guarantee and no prorated refund for books priced over $0.99