Many commercial
websites allow registered users or site visitors to update the price information, usually for an incentive such as "points" which are accumulated and displayed alongside a user's name. In some cases, points can be redeemed for rewards, such as an entry in a drawing for a prize, such as
electric vehicles and free fuel cards. Some sites also provide message forums to allow users to engage in discussions about gas prices and money-saving strategies, among other topics. Fuel prices are sometimes made available via SMS text messaging. One site,
Gasbuddy.com, has different web addresses for different cities in the
United States and
Canada. The site offers one gasoline gift card every day to contributors. == Government-sponsored services ==