Software as a service (SAAS) services featuring software for providing an online system to allow users to invite others to attend an event, a game, a visit to a location, to join an event or trip, purchase a product or service with associated links to purchase or attend by means of a ticketing service and reservation system, including the ability for users to invite others or bring others while the inviter or event operator can set rules on inviter and invitee eligibility as well as the number of invitations, and including chat, image exchange, video exchange, and social messaging between inviters and invitees within the platform