It’s a catch-up mechanic and I think it’s a mistake to have any gp limit. Players retire and need to be replaced whether they are spenders or ftp. The harder you make it to catch up means fewer people try. This isn’t about CAT but about the new player today who cg will need to fill the void of a retiring player two years time from now.
CG keeps making decisions that appear to make the assumption that their acquisition rate of new players will always out pace their losses of existing players. They have the numbers but I doubt this is currently true both for total players and spending done by those players.