Rights Managed, or RM, Photos, refers to a copyright license which, if purchased by a user, allows the one time use of the photo as specified by the license. If the user wants to use the photo for other uses an additional license needs to be purchased. RM licences can be given on a non-exclusive or exclusive basis.
Royalty Free images can be used and printed an unlimited number of times for personal use. Royalty Free images can not be sold or used to create income either directly in indirectly.
If you would like to use an image for comercial gain please purchase a Rights Managed Licence