Case C-920/19: Order of the Court (Seventh Chamber) of 18 May 2021 (request for a preliminary ruling from the Landesverwaltungsgericht Steiermark — Austria) — Fluctus s.r.o., Fluentum s.r.o., KI v Landespolizeidirektion Steiermark (Reference for a preliminary ruling — Article 99 of the Rules of Procedure of the Court of Justice — Article 56 TFEU — Freedom to provide services — Restrictions — Gambling — Dual system of organisation of the market — Monopoly on lottery products and casino games — Prior authorisation for the use of automatic gaming machines — Advertising practices of the monopolist — Criteria for assessment — Constitutional case-law finding the national legislation to be compatible with EU law)