1.
Growth at all costs kills. Subway cannibalized its own franchises, charged predatory fees, and opened stores that competed with each other instead of rivals.
2.
Promotions train customers forever. The $5 footlong generated $3.8B in one year but permanently anchored the brand to value pricing they couldn't escape.
3.
Founder dependency is an existential risk. When Fred got sick, the company had no real leadership structure and ground to a halt during its biggest crisis.