It was a framed as a singular event, and theater owners, desperate to fill screens with appealing content, happily agreed to it. “Given that atypical circumstances call for atypical economic relationships between studios and theaters, and atypical windows and releasing strategies, AMC is fully onboard for Warner Brothers’ announcement today,” Adam Aron, chief executive of AMC Entertainment, said at the time.He was much less welcoming to an entire year of this practice, which provides no additional incentives to theaters.“Clearly, WarnerMedia intends to sacrifice a considerable portion of the profitability of its movie studio division — and that of its …