Hi Raymond,
Thanks for checking out Event Aggregator!
For Facebook imports, you do not need to be the moderator of a page to be able to import its events. For a Google calendar, you just need the link (it does not have to be your calendar), but if the calendar is private, then you will need to get the private link to be able to import. This article has some more information on importing from URLs.
We do offer full refunds within 30 days of purchase, so feel free to test it out! Please let me know if you have any other questions.
Thanks,
Jennifer