TagZero Marketing Budget

I had written a post How I built a 1100+ users SaaS business as a Single Founder with Zero Marketing Budget some time back which got covered at YourStory. Since then I have got lot of mails asking many questions, I did tried my best (and will always be) to answer to everyone but it is not possible to reply to everyone so I thought I should write down a post putting down all my learning. I feels...