The Commission should periodically evaluate this Regulation and closely monitor its effects on the online platform economy, in particular with a view to determining the need for amendments in light of relevant technological or commercial developments. This evaluation should include the effects on business users which might result from the general use of exclusive choice of law and forum provisions in terms and conditions which are unilaterally determined by the provider of online intermediation services. In order to obtain a broad view of developments in the sector, the evaluation should take into account the experiences of Member States and relevant stakeholders. The group of experts for the Observatory on the Online Platform Economy established in accordance with the Commission Decision C(2018)2393 has a key role in informing the evaluation of this Regulation by the Commission. The Commission should therefore duly consider the opinions and reports presented to it by the group. Following the evaluation, the Commission should take appropriate measures. Further measures, including of a legislative nature, may be appropriate if and where the provisions established in this Regulation prove to be insufficient to adequately address imbalances and unfair commercial practices persisting in the sector.