Hi HN — I built TheWalll, a “message wall” where posts are limited to 75 characters. The constraint is intentional: it pushes people to leave a quick signature / wish instead of writing long comments. What it does today: Walls can be free or paid Pricing options: owner sets a fixed/min price, or the visitor chooses the amount ($3 minimum) Optional tips/donations Anonymous polls/voting Owner controls: pin messages, sort by newest or highest paid Basic analytics: visitors, activity over time, paid conversion, average message value Use cases we’re testing: weddings/birthdays (digital guestbook), cafes/restaurants (notes + tips), corporate/conf events (anonymous polls + feedback).