I believe Twitter does support paid private posts that you can subscribe to, but I've never seen anyone I follow use it
I have some paid substack blogs in my RSS feed. Some give you part of the post in the feed and then you have to click on the post to see the rest (in you’re a subscriber, else not). Others just say “click here to read” and again, if you are a subscriber (I am) you see the post.
- InviteMember (accepts most payment methods, including Stripe)
- CanalFans (accepts only USDT, and it's only available in Spanish, South American focused)
The way they work is that you add them to your private channel and the bot executes the sale, invites the member and kicks them out if they don't renew their subscription.
Of course they take a commission on the sales.
I mean, yes, it's on the scope of a toy project, but it's definitely not on the scope of a weekend project.
My software development estimation looks like at least 2-3 months with at least 3 hours daily on the IDE (on the Subscription Management side, ignoring the payment gateway, that as you mentioned: it's on Telegram already).