"Eventbrite Tickets connects the power of The Events Calendar to your account on Eventbrite.com. Send WordPress events to Eventbrite, import existing Eventbrite events, display tickets, and more."
EffectIO The Events Calendar: Eventbrite Tickets 4.6
A license entitles you to 1 year of updates for 5 sites. Each installation of the plugin will require a license key in order for you to receive automatic updates.