There are a number of companies which specialize in MCM, including Flashcall,[15][20][3] VivaConnect,[15][4] and Zipdial.[4][21][22] Zipdial was popularized by missed call services for cricket scores and Anna Hazare's anti-corruption movement; after serving over 415 million calls in its first three years of operation, the company was acquired by Twitter in 2015 for a value reported to be between US$20 and 40 million.[12][21][22][13] In 2014, the social networking service Facebook announced that it would support links to missed call numbers as an ad format, as part of an effort to bolster its advertising business in emerging markets such as Brazil, India, Indonesia, and South Africa.