By putting out relatively cheap VR headsets and requiring a meta (Facebook) account to use it, they are getting young people signed up for meta. Those young people might not have signed up for Facebook/Meta otherwise. It's a sneaky way to reduce friction and maybe convert young people onto the social media platform.
It also reminds me of how google's social network automatically created profiles on their social media spot. That experiment failed. Will meta's growth play fail?
This is purely me trying to figure out the business angle.