Snyder may have become a billionaire on her 35th birthday ... At the age of 17, Lynsi was the last blood relative surviving of the burger dynasty. But the businesswoman, now 42, never wanted ...

In-N-Out Burger employees love their boss ... Forbes' profile on the 36-year-old billionaire - who is reportedly worth $3 billion - points to how exactly Snyder and her company have been able ...