How often does it update?
Usually once a month when new works are made available to buy. It may update a little more if there's a crowdfunding campaign for a project I'm on.
Conversely, it may update less when the store is closed (usually the summer), or I'm not a part of any projects.
If you would like weekly updates about smaller things, you can subscribe to my blog via RSS.
How does it work?
To subscribe, you enter your email address though a Google Form.
To unsubscribe, you do the same thing.
I keep a spreadsheet with all of the active subscriptions, and remove any emails that have been sent through the unsubscribe form.
When the time comes to send out a newsletter, I update the active subscription list, and then BCC everyone with the newsletter email so no one else on the subscription list sees your email address.