It doesn't make sense because OnePlus is much more known in the West than either Oppo, Vivo or Realme. OnePlus also just sounds like more of a Western brand.
It would have made much more sense to kill those other brands in the West and unify everything under the OnePlus banner.
it's a frustrating pattern for sure. makes it so you can't reward good companies with return business. instead, we get the amazon-seller-experience: an ever-churning alphabet soup of fly-by-night companies hocking low-quality stuff.
I mean, in a vacuum, yes. But it made a huge splash with the OnePlus One, and they had some pretty nice phones since.
Oppo, Vivo and Realme sound like those weird dropshipping Amazon brands. Or the whitelabel brand Android phones you can buy on AliExpress. If I didn't know they are legit brands I would genuinely think you'd be trying to sell me a scam phone that fake-advertised having 12GB memory or a Snapdragon.
It would have made much more sense to kill those other brands in the West and unify everything under the OnePlus banner.