Yes, you can convert points into cash!
When you have a minimum of 10000 points ($100), email email@example.com to request a cash out.
You can find your points balance here or by hovering over the profile picture on the top right corner, selecting Settings, and then clicking on the Points tab.
LingQ will withhold a 15% commission for each tutoring lesson. However, there is no commission for points earned from referrals or sharing lessons.