... [One of the competitors] Eli Halali made it clear that 75 cents was a temporary price point. He said he could not make money at that level and eventually would return to $1. He said that if Bombay/6 Ave. Pizza went back to $1, he would as well.
This public statement seems like what the FTC called an "invitation to collude" in its suit against Vlassis who made a similar offer to end a price war with News America:
If News America continued to compete for Valassis customers and market share, then Valassis would return to its previous pricing strategy, and the price war would resume.
..., Valassis made the foregoing proposal with the intent to facilitate collusion and without a legitimate business purpose. ... Valassis’ statements described with precision the terms of its invitation to collude to News America. If the invitation had been accepted by News America, the result likely would have been higher FSI prices and reduced output
FSI refers to newspaper inserts, the product in question.
HT: Greg Mankiw