Of the eleven valid combinations, the five that lack the "by" clause have been retired because 98% of licensors requested attribution, though they do remain available for reference on the website.
Lima di antara sebelas lisensi valid yang tak mencakup unsur Atribusi sudah (hampir) tak digunakan karena 98% pemberi lisensi meminta Atribusi, tetapi masih dapat dilihat di situs web.