Wrote a web scrapper backend and mobile app as frontend to scrap my university online portal to check if any lecturer announced class replacement / cancellation

Wrote a web scrapper backend and mobile app as frontend to scrap my university online portal to check if any lecturer announced class replacement / cancellation and send notification to the mobile app if there is any class replacement/cancellation. The original goal is because of laziness to check the online portal. I have learnt Ruby, Rails, Linux server setup, Nginx configuration and iOS (Objective-C) from scratch during the development. The app spread in the campus with word of mouth and gained 2000 monthly active users in the first two months. University found out and sent me a cease and desist letter and then later implement recaptcha on their online portal login form. Thanks to this app I managed to get a decent paying job as an iOS developer. Kinda wild ride