Abstract: A method in an online social platform for online game between a networking system and users' device and content to be shared in a network service. An exemplary method includes creating in a content creator a challenge to invite users in a game and sending an invitation to the users' device to accept the created challenge in a predetermined time via a network and expiring in the networking system, a predetermined time when a networking system does not receive a response from a user's device to accept the challenge in the predetermined time and sending a content from a user application to a data stores in the networking system via a network in a predetermined time after the response is received from a user's device, wherein the content is a proof video accomplishing the challenge and the content that is to be shared with a set of one or more users of the network service.