Anything that I have created recently, usually spends some time in a separate directory until I have decided what to do with it. There is also a directory where I keep any mandelbrots and julia's that I have created. Some of them have rather unusual initializations and mappings. My images and formulae can be freely distributed, but I would appreciate a reference tag. This is especially true if it's published in any way.
Money is always a nice gesture at times like that, or at least a copy or two for posterity.
I haven't spoken to the posters on the subject of reuse, but I'm sure they would feel as I do. Their names are given in the index file in that directory. Other image directories contain submissions from individuals who I thought had something unique to offer or are reserved for specific fractal types such as IFS or Lyapunov fractals. I have tried to avoid storing anything that was copyrighted such as software or images where the poster claimed an exclusive right of any kind. This is not a complete archive or is it intended to be.