Craigslist started as a local community newsletter in San Francisco but grew popular and expanded to other cities. It focuses on classified ads for each local community. Craigslist now has over 25 million new classified ads, 1.5 million job postings, and 75 million user forum posts monthly. Though originally a side project, Craigslist incorporated in 1999 and owns its domain name to prevent others from profiting off its user base. The site is led by founder Craig Newmark as chair and CEO Buckmaster, who helped design its homepage, structure, and features. One challenge Craigslist faces is dealing with impostors who try to scam users through fake sales, phishing for information, or identity theft.