Some quotes found on another site, showing the financial value of Lin (with thanks to Nagel100 on the xscape from elba Knicks site.
"In the last week, the market cap of MSG, Inc., which owns Madison Square Garden and other sports venues, has added $71 million. "Because of Jeremy Lin," Steven Kiel wrote Tuesday, before Lin hit a game winning shot against Toronto, "shares hit a new 52-week high of $32.30. With 62.08 shares outstanding, today's move up of $1.15 means the market thinks Jeremy Lin's weekend success is worth $71.4 million."
"Although Bryant says he “doesn’t even know what Lin has done,” shareholders in Madison Square Garden, Inc., the parent company of the Knicks, do: Since Feb. 4th MSG’s stock price has increased from $29.32 to $31.15 February 10th, or 6%, adding $139 million to the company’s market value. During the same period the S&P 500 has gone up less than 1%"
".According to USA Today, MSG Network has seen ratings increase by 70% since the beginning of the Lin phenomenon. Ratings for the Knicks-Hornets game were 130% higher than for the same game last year -- and ratings drive advertising revenue. According to TiqIQ.com, the average ticket price for a Knicks game on the secondary market catapulted up 33%, from $229 to $304. "
So, from a purely financial viewpoint, Lin's contract is a good deal for Dolan.