I guess it is a combination of factors. As stated else where it seems like author has copied/forked existing project. Then (if I understood the license correct

I guess it is a combination of factors. As stated else where it seems like author has copied/forked existing project. Then (if I understood the license correctly) you are required to open source your software if you were to use the library, or pay $5k. On top of that if you contribute to the project you sign away your copyright. If these things are correct it seems like a one hot mess of a project.