When using photos, images, graphics, illustrations, etc. that are not yours, please provide a source link, proper attribution to the author and the license (if it's needed) under which you are allowed to use them as otherwise, DropaAhead team wouldn't be able to support your work!
As well, take in consideration that some of them although free for personal use and projects might not be free for commercial use (what Steemit is considered to be).