Are they related to Springer Verlag and/or that other German publishing group whose main objective was to take collections of Wikipedia articles, verbatim, and turn them into books?
Which is, btw., entirely covered by the license as long as you allow redistribution and have proper attribution. Wikipedia is mostly covered by CC-BY-SA.
Are they related to Springer Verlag and/or that other German publishing group whose main objective was to take collections of Wikipedia articles, verbatim, and turn them into books?