Five months ago, I started building an AI job-search SaaS during nights and weekends. I kept watching the signup count grow: 800 registered users. 530 uploaded a resume. 645 resumes uploaded in total. For a while, I thought this meant the product was working. Then I looked at the numbers that were less fun to share: 190 signed-in users were active last month. Around 40 are active weekly. 10 are active daily. 0 are paying. That changed how I look at early traction. A signu...