The costs outweighed the benefits for Christensen
For both of these promo cards, the non-glossy versions are roughly 10x-100x easier to grade as well because of non-glossy card stock, better centering, and no common edge damage from peeling from the corocoro comic
Things are a little better for the Ixalan tribes as far as sheer numbers go, but the truth is the payoffs arent really there and the supporting cast is weak
Spells that when they Resolve Sac a Land for Any Lands There are four of these, one four-cost sorcery that broke Standard with Valakut, and then sacs any number for any lands out tapped
Sure a 2/2 body is fairly low value but that only represents a small fraction of what the card is about
Instant speed graveyard hate is reasonably brutal to this spell, so maybe Languish is safer for Commander