@michaelgemar @Popehat 2/2. § 20(3a) ARC provides: “(3a) An unfair impediment within the meaning of subsection (3) sentence 1 shall also be deemed to exist where an undertaking with superior market power on a market within the meaning of Section 18(3a) impedes the independent attainment of network effects by competitors and in this way creates a serious risk of significantly restricting competition on the merits.”