Not exact matches
It's a case where the theory really did work out in practice, in that everyone
benefited by getting free
gameplay - content in addition to the part where they got some free cosmetics
too.
Just as the announcing
benefited from technological advances, the
gameplay can
too.
Mainstream games with audio - accessible
gameplay, such as Killer instinct, would still
benefit from screenreader accessibility as cost effective way to make their UIs blind accessible, and the UIs for dedicated audiogames are often based on screenreader compatibility
too.
There's a
gameplay benefit to the rivalry,
too, since the battles level up a new, fourth combat style.
Taking enemies down from behind silently and hiding the bodies from patrolling guards is a great way to keep alarms at a minimal; raising one means you'll have to «relocate» to another area before enemies close on your position and all hell breaks loose — you won't take
too much damage before death, which
benefits the
gameplay greatly.