This move by Meetup seems like a real cash grab.

Seems to me like the lesson we all keep getting is that SaaS business models can rapidly shift and we’re all better off owning our own content, experiences, and communities.

There are plenty of free and open source plugins for WordPress to handle event RSVPs. Our Event Tickets plugin (https://wordpress.org/plugins/event-tickets/) is one great option, but there are many others.