However, this was confusing to many users and contributors so we worked with our lawyers to update the public domain notices to also include CC0 and MIT or ASL2.
That seems to help but we still get questions about why include CC0 and an OSI license. There’s some confusion that these conflict although they don’t of material is released under both consistently. I think there are issues if you try to add one on top of the other.
But I wish there was a cleaner way to handle this to allow for software and source to be used widely.