American Airlines baggage fees apply to specific itineraries and reflect the same policies as US Airways. The fees associated with checked bags are determined by the travel destinations, as some locations charge for all checked luggage, while others only charge for the second or additional checked baggage. Additionally, bags exceeding the size or weight guidelines may incur additional baggage fees.
Airbnb has grown significantly over the last 3 years. To support demand, the company uses 200 Amazon Elastic Compute Cloud (Amazon EC2) instances for its application, memcache, and search servers. Within Amazon EC2, Airbnb is using Elastic Load Balancing, which automatically distributes incoming traffic between multiple Amazon EC2 instances. To easily process and analyze 50 Gigabytes of data daily, Airbnb uses Amazon Elastic MapReduce (Amazon EMR). Airbnb is also using Amazon Simple Storage Service (Amazon S3) to house backups and static files, including 10 terabytes of user pictures. To monitor all of its server resources, Airbnb uses Amazon CloudWatch, which allows the company to easily supervise all of its Amazon EC2 assets through the AWS Management Console, Command Line Tools, or a Web services API.
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%.
Hosts provide prices and other details for their rental or event listings. Pricing is determined by the host, with recommendations from Airbnb. Hosts may be required to report income and pay income taxes on income received via Airbnb. In the US, homeowners who refinance their mortgages with some agencies are able to count income they earn from Airbnb rentals on their refinance loan applications.