Royalty-Free means that you pay for the image you have chosen only once; then you can use it as many times as you want. There are no license fees except the initial fee and no other royalties to pay except those that were included in the initial cost.
There are, of course, a few restrictions.
Because I sell a number of my stock photos through Dreamstime.com the following information has been taken directly from their site. However most stock photo sites have very similar licenses and licensing agreements.
Royalty- Free License use of
The high-resolution images that you download under the regular Royalty Free (RF) license may be used in the following ways: to make fine art prints, on a web site, in a magazine, newspaper, book or booklet, book cover, flyer, application software (apps) or any other advertising and promotional material, in either printed or electronic media, as long as the item in which the image appears does not contradict any of the restrictions below. The list is not exhaustive and if you have any uncertainty regarding the use of the images in a correct way please email [Dreamstime] support.
Web templates, greeting cards or postcards especially designed for sale, similar print-on-demand services, canvas, t-shirts, mugs, calendars, postcards, mouse pads or any other items incorporating the image in an essential manner, intended to be sold are considered redistribution (if the image is used in an essential manner). The use of Dreamstime.com images for these purposes under the regular Royalty Free license is not permitted. It is also forbidden to make the image available on a website for download (as wallpapers for example), although you may use the image in a concept in as many websites as you want, for any number of clients. For Web use, you must not use the image at a width exceeding 800 pixels unless it is included in your site’s design. If the image is part of a design and manipulated accordingly, the image width can be higher than 800 pixels.
If you use the images for printed materials, the number of copies must not exceed 500,000. You may modify the images in any way required for reproduction, or include them in your own personal creations.
Buying the high-resolution image (purchasing the license) does not transfer the copyright. You may not claim that the image is your own and you may not sell, license for use, or in any way distribute the image for reuse.
We recommend that you credit the agency and the photographer when you use an image. By this you benefit the community at Dreamstime.com, of which you are an integral part, and help increase your success as part of the community, which, by growing contributions, gains quantity and quality.
More stock photo licenses and information tomorrow!