OwnsGameAccessFact
Whether the player has bought this game, from GameProductDataService. Pre-registered by AccessDataService as the fact behind WellKnownAccessFeatureNames.OWNS_GAME.
Registered at AccessFactPriority.BUILT_IN, so a game that has its own idea of ownership layers over it rather than fighting it for the name.
GOTCHA: ownership that cannot be resolved abstains rather than answering false. A marketplace hiccup must not read as "has not bought it" -- that is a paying player being turned away, which is the single worst outcome this package can produce.