In a comment on my question What if anything is wrong with the Apache License 2.0?someone (Zimm) reminded me that its considered bad practice to use a less widely known license.How wildly known is the COIL license?How wildly used are copyfree licenses in general?Jeff Atwood's recommendation of the WTFPL license in https://blog.codinghorror.com/pick-a-license-any-license/ is perhaps the highest profile recommendation of a copyfree license I can find.How do you go about answering the question of how widely known is wide enough?These questions are too broad for an easy answer so what I'm looking for is some pointers on how to going about getting a good enough answer to them.
Using a less common license
license recommendation;crayon licenses