Earlier quoted context omitted.
"From what I'm seeing, the entire US Taxi/Limo market is $11bn in value." That sounds incredibly low. That's twice the value of KING, and cabs are a lot bigger than Candy Crush. Maybe you mean the market is $11bn/year in revenue (or even in profits)?
Right, it's $11bn/year in revenue, averaged over 5 years. Is that not usually used in determining the value of a given market?
For comparison, Apple is currently worth around $565B, but its revenues were $176B in the last 12 months. Chipotle is worth $17B, but its revenues were $3.4B over the last 12 months.
A firm's revenue and its value are related, but usually not equal.