The tweet is showing an animated GIF of the Apple Event teaser art, in gold, and specifically mentions being able to “watch the #AppleEvent live on Twitter.”
When you accept the invitation, Apple sends an automated reply similar to previous years.
Join us September 12 at 10 a.m. PDT to watch the #AppleEvent live on Twitter. Tap ❤️ below and we’ll send you updates on event day.
This will also be the first time Apple will be live streaming the event on Twitter. Stay tuned to Appleosophy’s Twitter account and live blog for live updates during and after the event.