What the Index is
The in-game Index lists 72 ASMRs and breaks progress out by zone. New unlocks put badge markers on the Shop and Index buttons. A documented session sat at 17 of 72. That is one player's progress, not a requirement.
Chocolate card
The Chocolate card showed 2 of 7 found. The revealed names were Lollipop and S'mores Cat. The other slots were still hidden. The completion reward on that card was +900.0K Speed and +$22.98B, with 4 claims pending.
S'mores Cat is also the Eternal Index row at $65.00M/s. Lollipop's $6,890/s and Legendary label were narrated, not read off the income panel. Trust the Index for the name. Trust your own toy for the payout.
How to use a zone card
Open the zone, note the found names, and steal or hatch until the card completes if you want that zone's reward. Only Chocolate's reward numbers were captured. Do not assume Butter or Lava pay +900.0K Speed.
Butter's separate fact is the 18.0K Speed sign, which you need before steals there succeed. Lava is only tied to a report that Clay Fruits comes from there.
Sixty Index slots still have no public income row. This guide does not invent them.