Analysis of information sources in references of the Wikipedia article "Claque" in English language version.
By the 1820s the claque, known also as the chevaliers de lustre or the romains, was a well-organised, fully professionalized, system that was as much in control of the destinies of soloists as it was of plays and music drama. [...] For a new work. or for the debut of an artist, the chef de claque would approach the playwright and demand a number of the free tickets the author had received from the administration. Some of these would be used to get the rest of the claque into the theater, and the rest would be sold outside the door; this, and the straightforward cash payments made by artists, was the way in which extortion generated income. If the authors and artists cooperated with the chef de claque, they could look forward to guaranteed applause throughout the premiere or debut; if not, the chevalier de lustre would ensure that no member of the audience would express their approval [...]. Such a freelance organization worked well until the moment when more than one chef de claque approached the authors or artists, as happened at the Théâtre-Français during the 1820s.