There's an article I read saying that they will have sponsored locations soon. So I doubt they will monetize via a 3rd party ad SDK anytime soon. They'd rather sell the inventory themselves.
With explosive growth, the last thing they want is to monetize it so soon. They'd follow the FB and Youtube playbook to get it to even higher scale and stickiness first before selling it themselves. The sponsored location type ads make more sense that throwing up a video ad, which totally ruins the experience.