More teams means more money for UEFA, as the European organising body expects to earn €2 billion from this summer's European Championship, which features 24 nations for the first time.
The revenue is expected to grow from the €1.4bn UEFA made at 2012, when 16 teams played in Poland and Ukraine.
Euro 2016 in France will feature 51 games, 20 more than the previous edition, which means one million more tickets to sell as well as a 25 percent increase in television rights, which sold for €1.05bn, UEFA's marketing director Guy-Laurent Epstein told Bloomberg.
In comparison, the media rights for the 16-team Copa America Centenario, featuring teams from the Americas and being played concurrently, sold for just $112.5 million.
Three-quarters of the television revenue comes from Europe, but Epstein also told Bloomberg that UEFA saw "strong gains" in the United States, where the event is televised by ESPN, as well as in Brazil and the Middle East.
UEFA expects 130 million viewers per game in the group stage and 300 million for the final, leading Epstein to compare the tournament to "51 Super Bowls."
The sponsorships for Euro 2016 also rose by 40 percent to garner €450m for UEFA.