The 2018 season also saw significant developments in regional broadcast rights, as Chicago Fire and the newly created Los Angeles FC decided to sell their regional television rights exclusively to subscription streaming services (espn and YouTube TV) instead of a local or regional sports network. In addition to a flagship television channel, several teams (including Real Salt Lake and the Seattle Sounders) have also entered into streaming deals in the market.  In 2019, D.C. United also signed a contract with FloSports (which replaced Sinclair Broadcast Group), but the partnership was criticized for the more limited availability of programming and promised that there was no additional coverage that was ever achieved. The team split from FloSports before the final game of the season and signed Sinclair for the 2020 season.  In 2020, Chicago Fire FC also returned to regional linear television with a multi-year contract with WGN-TV, coinciding with the final year of its agreement with ESPN.  When, in the early 2000s, discount and flat fee plans gained popularity, some MLSs changed their affiliate rules or applied rules to make discount/flatfee-MLS offers difficult or impossible.  Subsequently, the Federal Trade Commission investigated several breaches of cartel and abuse of dominance legislation and made comparisons with five MLSes to allow free competition for ads.  An MLS, Realcomp in Michigan, refused to enter into a transaction/approval agreement with the FTC and asserted that it had the right to conceal discount listings because such competition was hurting its members` revenues.  In 2006, the FTC filed a lawsuit against Realcomp MLS, which alleged violations of federal cartel laws and the crushing of free competition.  The appeal was tried in 2007 and the FTC lost, but won the case unanimously in 2009 by 4-0.
 A Multiple Listing System (MLS) is an organization with a number of services that real estate agents use to create contractual offers of cooperation and compensation (between brokers) and collect and disseminate information to enable valuations.