If I had to pick ONE reason why I got the Z Flip 3.
My order finally went through with Samsung after numerous attempts, their process is a PITA!  What's worst is they won't tell you the reason why?  Anyways, it was just my postal code format.  lol
Now that I got that out 
THE reason is Samsung Care+ is included.  Correct me if I'm wrong but this is the first time Samsung is doing this right?  If not, I guess I didn't pay attention enough because IMO the display is too fragile.  As I said in another thread I was really impressed with the improvements Samsung made.  I was sold, I told my girl I'm buying this when we get home, (I got her the iPhone 12 Pro, so no complaints).  
The other bonuses helped.  I got it in green (my favorite color).
My nephew helped with 10% off.
Free Galaxy Buds 2 and Wireless Charger Duo.
I got $200 for a liquid damaged Galaxy A70.