Why follow GCal on Twitter?

I have read many blog posts on the topic of using Twitter to increase your productivity. One thing that all these posts had in common was that they directed the reader to follow GCal, or Google Calendar, on Twitter. This would allow you to send direct messages to GCal in order to update your Google Calendar.

This is extremely redundant since most Twitter posts and direct messages are made from cell phones. And GCal already has a mobile option. You can activate it by clicking the Mobile Set-Up tab in the calendar settings.

The number is 48368 which spells GVent. When you send text messages to GVent, a new event is added to your calendar and you receive a verification text message from GVent.

And if you post on Twitter from your computer, there is no need to follow GCal because you can easily open Google Calendar in a separate window or tab. So the answer to the question "why follow GCal on Twitter?" is why would you.