Sounds like it's a combination of not wanting to deal with the number of submissions increasing every month, a philosophical stance of wanting to support seriou

Sounds like it's a combination of not wanting to deal with the number of submissions increasing every month, a philosophical stance of wanting to support serious, human writers rather than people trying to make a quick buck, and perhaps some trepidation about the legality/ethics involved (since they use the word "plagiarize" in the article).