Sarebbe abbastanza stupido da parte loro attivare un sistema così e limitarlo solo ai gift e non, in generale, a tutti i giochi col blocco regionale.
Se il gioco è marcato col flag "onlyallowrunincountries", allora dovrebbe essere soggetto al controllo in fase di avvio, oltre che di attivazione
Il significato dei vari flag (che ogni publisher può decidere di applicare o meno, a discrezione, e Valve esegue) dovrebbe essere:
AllowCrossRegionTradingAndGifting = No
means a gift can't be activated outside the region of origin, if the region in question is one of the following: Russia/CIS, Brazil/South America/Mexico, SEA, Turkey. This does not affect gifts purchased elsewhere (US, EU, Japan, Canada, Australia and every other country that's not in the first list) - these can be activated and played everywhere.
PurchaseRestrictedCountries
This is used to list the countries affected by the next tag
AllowPurchaseFromRestrictedCountries = Yes
This gift (sub) can be purchased only in countries listed in previous tag
AllowPurchaseFromRestrictedCountries = No
This gift (sub) can't be purchased in countries listed in PurchaseRestrictedCountries. Either because there's a separate sub for those countries or the game in question is not available there at all.
onlyallowrunincountries
Will be followed by a list of countries (same list as PurchaseRestrictedCountries) where game game can be played. It won't launch elsewhere.