If you are considering buying this phone from Visible, now looks like a great time.
OnePlus does have an announcement on 3/8/2021 OnePlus Unveils Its 'Moonshot' Next Week (droid-life.com)
No other promotional gifts are included with purchase.
Reddit has some threads about this phone: OnePlus 8 model that works with Visible? : Visible (reddit.com) and OnePlus 8 : Visible (reddit.com)