https://wccftech.com/dota-2-lootbox-rewards-dutch/

It appears that players in The Netherlands can now view the contents of a Dota 2 lootbox before opening it.

It appears that Valve has made changes to how lootboxes work for Dutch players following a recent ruling from the Dutch Gambling Authority. Valve recently already disabled Steam trading and Marketplace transfers in the game after the Authority announced that it will be checking whether games using lootboxes are still in violation with Dutch gambling laws on penalty of huge fines.