This data is collected by a process called OVRServer_x64.exe, which is always on and has full system privileges to send information back to Facebook. This information is then used to “send you promotional messages and content and otherwise market to you on and off our services”.
“Facebook owns Oculus and helps run some Oculus services, such as elements of our infrastructure, but we’re not sharing information with Facebook at this time. We don’t have advertising yet and Facebook is not using Oculus data for advertising – though these are things we may consider in the future.”
KitGuru Says: People have been having privacy issues with Facebook for some time and now this seems to be spreading to Oculus. However, perhaps Oculus's response will offer some explanation for some users.