They lost influence like the rest of cosa nostra because they had about 50 turncoats like:

The Casalesi clan counts about fifty collaborators of justice between bosses and minors. A partial list follows:

Carmine Schiavone (1993), died in 2015
Domenico Bidognetti (2008)
Antonio Iovine (2014)
Luigi Basile (1988)
Attilio Pellegrino (2014)
Raffaele Ferrara
Franco Di Bona
Dario De Simone
Angela Barra (2003)
Giuseppe Quadrano
Emilio Di Caterino
Cipriano D'Alessandro (2013)
Luigi Diana
Alfonso Diana
Salvatore Venosa (2012)
Massimo Amatrudi
Luigi Tartarone (2012)
Anna Carrino (2007)
Mario Schiavone (2009)
Salvatore Laiso (2009)
Salvatore Fasano (2009)
Giuseppe Guerra
Orlando Lucariello
Roberto Vargas (2010)
Raffaele Piccolo
Paolo Di Grazia
Oreste Spagnuolo (2009)
Francesco Cantone
Luigi D'Ambrosio
Gaetano Vassallo (2008)
Pasquale Vargas
Giovanni Ferriero (1999)
Maurizio Di Puorto
Nicola Panaro (2015)
Massimo Pannullo (2003