Isn't it just a temporary measure to ease congestion in the morning until the pandemic is over? (Ok, that could be a while.) To be honest, I don't see it saves money, most of the people I know with Freedom passes or Over 60 cards rarely travel before 9:30. I've only been on a tube a handful of times in the past year to attend specific conference sessions at Olympia, ExCel or Astrofest, Kensington ... or at the weekends to attend astronomy/astrophysics conferences ... but non of that's happening at the moment, it's gone on-line.
Michael Ixer ● 2134d