To be fair, the Springer empty PDF paper for $39.95, has zero errors, and zero plagiarism, so it is above the bar of their other paywalled proceedings papers.
As it introduces the (very) reduced Planck constant, it's obviously worth $39.95 for historical value alone. A bargain at any price!
Even emptiness can be plagiarized. See Cage's 4'33"
https://en.wikipedia.org/wiki/4%E2%80%B233%E2%80%B3#Plagiari...