Christian Ghibaudo wrote on the group on 27 March 2022:

Indeed, in order to reduce the energy bill, night broadcasting (when there are fewer listeners) is suspended.
Following the surge in energy prices, BCE increased the rental price of transmitters. RTL/M6 doesn’t want to pay more, so the only option was to decrease airtime.
A reminder the Luxembourg transmitter on 234 kHz does NOT belong to RTL but to BCE Luxembourg.

Mike Terry to Longwaveradiolistening iog (2022-03-29)