The unnamed operator tweeted updates on games and in some posts quoted odds and included a direct link to its website where consumers could place bets on the matches.
Dutch law prohibits advertising during sports events in order to discourage players from impulsive betting.
As such, the KSA said the operator’s tweets on the matches breached this regulation.
The regulator contacted the licensee once it was aware of the tweets, ordered it to cease posting immediately and to not carry out this form of marketing in the future. The KSA said the operator complied with its orders.
The KSA added that it would continue to monitor the operator’s activities and warned it could impose sanctions if further breaches were identified.
The warning comes after the regulator last week also issued warnings to a number of operators over their advertising policies, after raising concerns that their activities could attract minors and young adults to online gambling.
The KSA observed all 11 licensed operators in the country’s regulated igaming market, which launched on 1 October last year, and found three licensees intended to advertise on platforms primarily aimed at children and young adults.
These included the Donald Duck website, YouTube channel TeenTok and around television family programmes such as MarbleMania.