Yesterday I got my first-ever OpUp on Star Alliance
VIE-ZRH on OS. Ticketed in cheapest 750-miles earning fare.
At online checkin the system offered me business for 99 EUR, which I declined.
On airport they made me check my bag, as it was 12kg and 'the plane is totally full'.
And at gate they called my name the second I entered gate, and handed me new boarding pass.
Business had 6 people total sitting in 3 rows (12 bus seats without middles)