I find it funny people love burnt joker (level up first discarded hand), but hate space joker (1 in 4 chance to level up hand played). Do people not know you're supposed to spam high card with this thing? If you're playing 3 or 4 hands every round you're gonna proc it a lot, possibly more than burnt joker. I've had space joker carry many of my high card runs. Also stacks with burglar, one of the best jokers in the game.
I usually don't go high card runs, but I love pairing anything like this with doubled odds and lucky card spamming. Burnt is definitely overrated, though, as you have to sacrifice perfectly good hands to do anything except high card.
Yeah, this is a scaling joker, which means you need to play sub-optimally (and with bad joker orders) to trigger the effect as much as possible. When you get to endless mode, you drop the weighted clothes, and suddenly, you're hitting millions of points.