Finished the (bare minimum) MVP, launched the marketing site (www.bartleby.ink), and built an entire automated beta invitation system. Users can sign up on the marketing site using Prefinery (and share with a referral system). Then I can individually select users to invite, which sends an email with a link to a Typeform survey. The survey asks about your writing and what you want out of writing software. Completing that then sends another email with the account creation url and beta test instructions.