Partiful Calls Apple a Copycat for New Invites App

The developers behind well-known event app and website Partiful today suggested that Apple was in violation of its own App Store guidelines for the release of the new Invites app.
On social media, Partiful shared a screenshot of rule 4.1, which covers copycat apps.
Come up with your own ideas. We know you have them, so make yours come to life. Don't simply copy the latest popular app on the App Store, or make some minor changes to another app's name or UI and pass it off as your own. In addition