https://www.pcgamer.com/csgo-and-dota-2-trading-disabled-in-the-netherlands-after-loot-box-crackdown/

In April, a study of loot boxes by the Netherlands Gaming Authority concluded four out of ten videogames considered fell foul of the country's gambling laws. And while specific games were not named at the time, the regulator body warned that "enforcement action" would be taken against any games that failed to meet legal requirements by June 20. 

That's today, of course, and it now appears loot boxes in both Valve's Counter-Strike: Global Offensive and Dota 2 have been deemed illegal. As reported by tweakers.net (via Reddit), players of both games were met today with a message from Valve detailing the sanctions.