Was anything else needed to be added to the product?

I was fine with meetup.com in its original form: it had the community of people wanting to go to events, it let you share your events to these people. People showed up to events.

And the price you pay is for you to access their users. If you think it's just an RSVP page, vibe code one in 5 minutes and try and see how many people will show up to your events.

It's a modern product development failure to think that you must be adding new features all the time. "Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away."