Hi Robert!
Thanks for considering Event Tickets and Event Tickets Plus 🙂
Your customers can absolutely order multiple tickets in the same transaction – they can even be tickets for different events. Discounts aren’t supported directly but, if for instance you combine Event Tickets Plus with WooCommerce, then you can potentially take advantage of a large number of addons for that platform that might facilitate this.
And they have to/can fill the information for the ticket for more persons, when someone orders for 3 peoples, we need the information, name, address etc, from those three persons?
Event Tickets Plus supports user definable fields that let you collect personalized data for every ticket that is ordered, so that could be one way to do this — find out more via the following knowledgebase article:
theeventscalendar.com/knowledgebase/collecting-attendee-information
I hope that helps but do let me know if you have further questions!