I don't know if this is true for others, but when I click the ICS link I get a file of events I can add to my calendar. It's not clear that I've subscribed to the calendar and will get updates; in fact, I think it's just a static list of events I've added. Is there a way to share the Google Calendar so that I can get updates?
It depends on your calendar software I suppose, but I believe most support some way of "subscribing" to an .ics-based calendar hosted at some URL. Your calendar software / service then periodically retrieves the .ics file to update its view of events.
You can use the following link to view the calendar in your browser: Racket meet-ups
If Google Calendar is the calendar service you use yourself, then the "+" button at the bottom-right of the viewable calendar I just linked to may be the simplest way to add it to your personal list of calendars.
