Hi, Ronald.
1) visitors or site users add their own events
Our PRO add-on does not add this functionality, but our Community Events add-on does.
If you have both PRO and Community Events (CE), the front-end CE form gets enhanced with recurring events and custom/additional fields.
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
Let me know if you have any follow-up questions.
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2) RSS question
You posted in our Pre-Sales forum from a user account that doesn’t have any purchases associated with it.
We don’t answer support questions for The Events Calendar core/free or Event Tickets core/free or their paid add-ons in the Pre-Sales forum.
If you made your purchase(s) through a different user account, please login to that account and then post in one of the paid forums.
Thank you for your understanding and thank you for using our plugins.