Flickr has no reliable identity or payment data in most cases.
this fiasco clearly shows their management is totally clueless and completely downplayed all the legal requirements needed to sell photos online, IP infringement, copyright, licencing, and all.
from a company worth billions you would expect much more and instead they're acting like a fly by night operation trying to make money out of piracy and dodgy deals just like youtube and so many others in the so called user-generated-content (UGC) industry.