LeFanu (most recently) et al:
If the BOGO (what, that doesn't stand for Buy One, Get One?) is hard to read, or learn from, and is just an ambiguous tableau, that's a good disincentive. It might be fun for stimulating the story-telling juices for Hallowe'en tale-telling contests, but not much more, you're suggesting?
The Dark Grimoire? I don't know if I've ever read anything of Lovecraft's (strange name for his field), but I was hoping that the cards would sort of illustrate the reversals of the usual positive meanings of the other decks; show the perversion of those meanings, for an armchair education in psychopathology, rather than for readings.
Deviant Moon...what do you mean, it's plastic? You mean the faces, or the cards? I went to the artist's website from this one, and his work was gorgeous. Do you mean, his original art is gorgeous, and USG shinied and cheapened it? AAAAAACK!
(Oh, and to the lady who told me to enjoy the decks I have, and put off the spree for a few months, that's good advice--just like my mother would give. But, I no longer put on a sweater when she feels chilly, and don't eat spinach every day! So, Mom-advice doesn't go as far as it used to, I'm afraid.)