In my experience, it hasn't been intrusive.
Start it. That's it-
I'm sure it's datamining, and I assume it's sharing my involvement with oculus in the same way FB likes to 'overconnect' people- "Hey, you are already friends with ****, why not talk to them on instant messenger" or "Hey, Bob, Carol, and 3 other friends used FB marketplace last week/ pinterest/ etc...."
But I haven't seen any of that. Once logged in, you can go to FB if you want through the program, but, the options flow more like a smart tv where you can scroll between netflix, youtube, amazon, crackle, disney, ...whatever. The FB is just a little icon among all the other options. There are options where you 'could' connect with other oculus fb using friends and play games and such, but I'm not doing that, and it doesn't force it on you.
Since this is all on my wife's phone/ account, I only use it when she's around. Which is probably good, because there is there is hot little prada model who takes you on a tour of italy in a gondola and such.
Today- real time yardwork. If the amorous prada model was here, I'd tell her to go stack some firewood.