“Five percent of the time, rather than a normal art card, you'll get one with a gold-stamped signature of the artist.“
Who wants a gold-stamped signature? To have a 5% chance of a random art card (1.5 per 30 pack box) with a fake signature is not appealing at all to me. Even real signatures are low in demand (often seen as damaged cards), except for verified cards by a handful of popular/inaccessible artists.
“They're not playable Magic cards, just fun objects to have around...”
I’m sure some people must still have modern horizons art cards on shelves to display. I still have a soulherder art card with my tokens. If they’re just fun things to have around why do only 5% have fake signatures?
“...or collect.”
Oh! It’s because they want to get suckers addicted to a new thing. I hope they find out that gameplay does matter. I’m hoping we’re not to the point that non-playable, artificially scarce, art versions of actually playable cards hold any value among Magic players.