Given the substantial economic power of gatekeepers, it is important that the obligations are applied effectively and are not circumvented. To that end, the rules in question should apply to any practice by a gatekeeper, irrespective of its form and irrespective of whether it is of a contractual, commercial, technical or any other nature, insofar as the practice corresponds to the type of practice that is the subject of one of the obligations laid down by this Regulation. Gatekeepers should not engage in behaviour that would undermine the effectiveness of the prohibitions and obligations laid down in this Regulation. Such behaviour includes the design used by the gatekeeper, the presentation of end-user choices in a non-neutral manner, or using the structure, function or manner of operation of a user interface or a part thereof to subvert or impair user autonomy, decision-making, or choice. Furthermore, the gatekeeper should not be allowed to engage in any behaviour undermining interoperability as required under this Regulation, such as for example by using unjustified technical protection measures, discriminatory terms of service, unlawfully claiming a copyright on application programming interfaces or providing misleading information. Gatekeepers should not be allowed to circumvent their designation by artificially segmenting, dividing, subdividing, fragmenting or splitting their core platform services to circumvent the quantitative thresholds laid down in this Regulation.