Hey there, thanks for getting in touch!
Event Aggregator is actually already included in The Events Calendar, which is a free download on WordPress.org:
The Events Calendar
Once you’ve purchased a license for Event Aggregator here on this site, you can copy the license key, head to Events > Settings > Licenses, enter the license number, and save your settings. That will unlock Event Aggregator so that you can import events in the Events > Import section of the app.
There is only one tier level for Event Aggregator at the moment. However, we are in the process of making more and you will certainly be able to change tiers when they are available, if you’re interested. I don’t have an exact timeframe for when they’re coming, but I do know it’s something we’re actively working on.
Does this help clarify things a bit? Please let me know. 🙂
Cheers!
Geoff