Fair-code is not a software license. It describes a software model where software:
- is generally free to use and can be distributed by anybody
- has its source code openly available
- can be extended by anybody in public and private communities
- is commercially restricted by its authors
“Hey, developer, your software is just about perfect for my use case, I just need to make this one small change. Can I go ahead and do that?”
"Sure, you can make that change, just as soon as you pay us $X. Oh, and we are planning on including that feature in the next release, so you can go ahead and buy that from us.