Hi,
Thanks for the interest in our plugins. I can help out here.
1. I plan to categorize events into 3 sections: upcoming, past and affiliate events. Is it possible to display events by category on the specific pages by using Events Calendar PRO?
For the event category’s the plugin does create a Category View for each Event Category with the main views of month, list, map, etc…
For example if you have an event category of Lettuce the url is this:
yoursite.com/events/category/lettuce/
So that is one way to show only events from one category in the main views and you can link directly to any of those.
2. If I would like to sell tickets via online payment, do I have to purchase Event Tickets Plus add-on separately for $89?
If you would like to sell tickets then yes you will have to purchase The Event Tickets Plus.
However, the category views work in the core version of the Events Calendar found for free on WordPress.org: https://wordpress.org/plugins/the-events-calendar/
So you do not need Pro for that or for Event Tickets Plus to work either.
You only need Pro if you would like Pro Features.
Let me know if you have any follow up questions.
Thanks