At some point you've made a successful web app, and then you need to make a successful business and supporting services, and you need to minimize costs and meet

At some point you've made a successful web app, and then you need to make a successful business and supporting services, and you need to minimize costs and meet SLAs that are required to secure your revenue. So the subset for a 'successful web app' is a useful distinction to get started, but the condescension implicit int he second list just comes off as ignorance.