GP’s point was that you don’t need to close your Steam account because it doesn’t cost anything: you only pay for the individual games, not Steam itself.
EDIT: I believe GP is incorrect about the nature of subscription fees for PS+ and Xbox Live, though. As far as I know, standalone purchases of games from those services do not ever require a paid subscription - you need to retain your account and connectivity for the license checks, but that's free and does not require a paid subscription on either service, so pretty much the same as Steam. But they are correct that those platforms don't provide other store options. EDIT 2: Ah, I misread GP, they said "online content", and maintaining subscriptions on those services is required for that.
EDIT: I believe GP is incorrect about the nature of subscription fees for PS+ and Xbox Live, though. As far as I know, standalone purchases of games from those services do not ever require a paid subscription - you need to retain your account and connectivity for the license checks, but that's free and does not require a paid subscription on either service, so pretty much the same as Steam. But they are correct that those platforms don't provide other store options. EDIT 2: Ah, I misread GP, they said "online content", and maintaining subscriptions on those services is required for that.