Finally a free version, people have ripped of others with previous paying services for years (I say ripped off because they particularly used open source projects without attribution)
Which paid services are you referring to? It is likely that these services aren't distributing the projects they are based on, if so, then they are in compliance with the licenses of the open source projects, which probably don't require attribution unless you distribute them.
This project started in 2015 btw. Another similar project called waybackpack started in 2016. There are probably more projects. IMO wayback-machine-downloader is the better project though.
https://github.com/jsvine/waybackpack
The Wayback CDX Server API these projects are based on is quite simple to use btw, just some JSON responses to decode.
https://archive.org/help/wayback_api.php https://github.com/internetarchive/wayback/blob/master/wayba...