Flickr™ Photo Images for Commercial use

Using images from Flickr™ to illustrate your on-line writings is a great idea. To avoid copyright issues, always use images that are fully available for commercial use. This applies especially in cases when you are not quite sure if your web presence can be considered commercial or not, like for example website with enabled section for Sponsored links.
Compliance with image's copyright can be done through checking the appropriate boxes at advanced search mode. All photos are published under Creative Commons License, and those photos have copyright restrictions in range from complete copyright protection to fully available for modification and use, even selling, by third parties.

The image in this post called
"Copyrighted performance" by wseltzer is an excellent example to illustrate the proper way to use a photo - It has the word copyright in it (exactly what I was looking for to use as illustration for this entry) and it is Ok to Share — to copy, distribute and transmit the work AND to Remix — to adapt the work.
Those images can be used after proper Attribution through the links provided here. "You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work)."