Paradox HOI4 portraits policy

There's one thing I don't really understand, and that's policy of Paradox behind putting existing portraits of leaders and generals behind a paywall. There's lot of nations that uses outdated leader portraits or don't have portrait at all, whoever the portraits for them exists but they're locked behind ownership of DLC. For example, if you don't own Gotterdammerung there's completely missing portrait for Reichskommissar Arthur-Seyss Inquart, but the portrait for him exists so why is this one specific reichskommissar portrait locked behind a DLC ownership and the others don't? There's other examples like lot of outdated portraits while there are already new one, but behind a paywall. I think the policy of Paradox in terms of portraits is very inconsistent.