To help fund the site, the founders created special edition breakfast cereals, with presidential candidates Barack Obama and John McCain as the inspiration for "Obama O's" and "Cap'n McCains". In two months, 800 boxes of cereal were sold at $40 each, which generated more than $30,000 for the company's incubation. It also got the company noticed by computer programmer Paul Graham, who invited the founders to the January 2009 winter training session of his startup incubator, Y Combinator, which provided them with training and $20,000 in funding in exchange for a small interest in the company. With the website already built, they used the $20,000 Y-Combinator investment to fly to New York City to meet users and promote the site. They returned to San Francisco with a profitable business model to present to West Coast investors. By March 2009, the site had 10,000 users and 2,500 listings.
A study published in 2017 found that increasing Airbnb listings in a given neighborhood by 10% leads to a 0.42% increase in rents and a 0.76% increase in house prices. According to an analysis conducted in 2016, while commercial listings comprised only 10% of Airbnb's total listings in 25 largest U. S. markets for the period between June 2015 and May 2016, they constituted about a third of host revenue. In markets such as Los Angeles and Portland, Oregon, the share of revenue from commercial listings reached nearly 50%.
In 2011, due to a downturn in the airline industry, American Airlines' parent company AMR Corporation filed for bankruptcy protection. In 2013, American Airlines merged with US Airways but kept the American Airlines name, as it was the better recognized brand internationally; the combination of the two airlines resulted in the creation of the largest airline in the United States, and ultimately the world.
Guests can search for lodging using filters such as lodging type, dates, location, and price. Before booking, users must provide personal and payment information. Some hosts also require a scan of a government-issued identification before accepting a reservation. The company also provides travel guides, entitled "Neighborhoods", which provide details about staying in specific neighborhoods in various major cities.