Ownership before value
The gang hires arbitrators to divide an unscratched ticket instead of checking whether it has won.
Supporting source ↗CASE FILE · S12 E06

The gang goes to a professional arbitrator to decide who's the rightful owner of a scratch off lottery ticket. While they're there they also try to clear up whether or not the events surrounding the scratcher prove that Frank is a hero or hate monger.
THE SHORT VERSION · SPOILERS AHEAD
The gang hires arbitrators to divide an unscratched ticket instead of checking whether it has won.
Supporting source ↗Frank’s insult triggers Charlie’s rescue kick, entangling gratitude with the gang’s prejudices.
Supporting source ↗Mac initially comes out to claim the prize, then chooses to stay out after the paperwork is signed.
Supporting source ↗The ticket wins $10,000, but seventeen hours of arbitration cost $9,986. The gang assigns Mac the bill.
Supporting source ↗THE EVIDENCE
Charlie kicks Mac away from the falling piano.Source ↗
Dee emerges carrying a medical reference book.Source ↗
Dennis presents Mac’s modified bicycle.Source ↗
Frank argues that his warning saved Mac.Source ↗
The remembered purchase takes place at the coffee counter.Source ↗
Mac displays the bicycle’s modified mechanism.Source ↗
Charlie smokes at the conference table.Source ↗
The remaining gang members examine the arbitration bill.Source ↗
Mac displays the disputed yellow scratcher.Source ↗
A large medical reference book rests in Dee’s arms.Source ↗
A sweets packet lies among the table’s evidence.Source ↗
The gang assembles around the conference table.Source ↗
Mac keeps his declaration after signing for the winnings.Source ↗
Tags document researched occurrences, not every appearance. Read the research notes and attribution.