Elon is just using Twitter as if it's an experimental huge platform wherein he can inject any feature that he wants to have. Now, those blue check marks on those accounts that didn't pay for the subscription have been removed.
In most of them. With some of famous people twitter decided to keep the blue tick even when those account owners publicly tweeted that they haven't paid for the check mark and that they would never do so.
Soon, we might see Elon making the blue tick/check mark into an icon of Dogecoin. Well, that's how convenient it is for him to do anything as he wishes since he owns the platform.
Dogecoin and dogecoin foundation accounts already has a blue check mark. I am uncertain if they bought it or not though. It doesn't matter to me. I am not buying it. I wouldn't want to delete my account either so i might wait that Elon sells the twitter again so i can use it.