All this shows is they're banking on a larger sum of sales coming on PS5 and want to protect that. Not that that's a surprise. GTA V in general sold better on PS3 and same for re-releases on PS4 and this gen.
Insider GamingGTA 6 PS5 Codes Are Region Locked But XBOX Version Isn’t insider-gaming.com/gta-6-ps5-co...