Evite was hot for awhile - totally gone downhill. Same as meetups. Tough to make those things as paid businesses which is probably necessary to keep them operating well (or at least take VC money and try and make a return).
Meetup has become the worst service I use, bar none. They pretty much doubled our group fees from $200 a year to $400 a year, then started putting giant banner ads at the top of all of our member emails, then started locking essential features (like seeing RSVP lists) behind a member-level membership and started begging our members to give them money directly.
I think Apple's right about at least part of this - something like Evite isn't an app (or worth paying for), it's a feature that needs to be stuck onside another app that gets paid for.
I see people using Luma everywhere these days
Luma and Gemini have very similar logos, it’s kind of off putting
Luma drives me nuts at conferences, I often end up invited to events without an address because they expect you to subscribe to their calendar feed rather than letting me put an entry in my own calendar.
I see very little use of either Evite or Meetup at this point though I imagine if I sought them out I'd see some continued use. (I do run into an Evite signup from time to time for a paid event.)
For a short period of time back in 2013 or so, we had AnyVite, which was so much better than Evite in all ways. I wonder what happened to them. I think they basically disappeared.