Go Go Neo Rangers!
Not everyone has time to play more than 3 games are year if not that.
There are a ton of people who only buy no more than 2 games a year. If they have to get Gamepass for online that's a bad deal for them. If online is free for them then that's a ton of Gold money Microsoft is letting go of.
The idea would be converting them to GP with their remaining gold subscription to give them a taste imo and hope they don't cancel.