The game was “The Pale Beyond”

Here was them saying 10% of sales were on Deck.

Later on, after the game had been out awhile and had some sales, the percentage of deck players dropped to a still respectable 5%.

My interpretation of that is that the Deck users were more likely than non-Deck users to pay full price for the game at launch. Considering that deck users only make up 0.6% of players based on Valve’s hardware survey, it would seem like Deck owners buy far more games than the average user.