A founder sold his SaaS on @acquiredotcom at $12K MRR and a few years later, he's building another one approaching $1M ARR with over 5 million users. Pretty awesome story. Paresh Deshmukh (@pareshmukh) and his cofounder Chirag built their first SaaS while working full-time. It took them over two months just to get their first 10 customers. Eventually they figured out distribution, grew to 100K+ installs and $12K in monthly recurring revenue. Then they listed the business on…