to the agreement to participate in a joint, class, or collective action in a judicial, arbitral, administrative, or other forum, concerning a dispute that has not yet arisen at the time of the making of the agreement. (5) Self-preferencing The term self-preferencing means, with respect to an operator of a dominant platform— (A) advantaging the products, services, or lines of business of the operator on the platform over the products, services, or lines of business of another business user