Would you try this platform alongside your Substack?

Last December, I launched StampFans here on Product Hunt. Think Substack, but for snail-mail. You set up a StampFans, share the link with your audience, and anyone can subscribe. Once you have subscribers, you're able to send them a real, ink-on-paper letter once a month. It's a super-special experience that your readers won't soon forget ;) It's a lot like Substack, but of course, it's on real paper. Here are some benefits: 1. 100% open rate! No, I'm not exaggerating. We ran a survey last month and discovered that not one single subscribers failed to open the letter they got in the mail. 2. <2% unsubscribe rate. So far, only 2% of subscribers have unsubscribed. That's across four months! With fewer letters, subscribers have fewer opportunities to decide they want to quit, and unsubscribing entails logging back onto the website (not just one click in the email). StampFans is an all-around "stickier" subscription. 3. More manageable pace. Substack is intense. Successful writers send emails multiple times weekly, and subscribers expect a lot of emails. But with StampFans, subscribers don't expect so much - snail-mail takes time, and they don't expect writers to send a new letter every few days. It's a once-a-month experience from the get-go. StampFans is not a replacement for Substack. While some of our most successful writers use only StampFans, it's something you can set up alongside your existing Substack as an upsell for your biggest fans. It costs nothing! We keep $3/subscriber per month to cover postage, paper, and processing. You keep every dollar you earn over that amount. So far, the average monthly fee is $8 - writers are earning $5/ subscriber per month. I'd love to explain more, if you're interested. We've had dozens of writers sign up already and we've sent letters this year to hundreds (soon thousands!) of subscribers all around the world.