All the pictures on Whoosnap Marketplace are royalty-free. That means each buyer pays once for all the license for your content: he will then have the authorization to use it several times. The buyer doesn’t have to pay additional taxes each time he used the content. He will only have to use the acquired content in all due respect for the license contract.
The content acquired under royalty-free license are non exclusive and can be used worldwide an indefinite number of times.