Me, I've registered since November 29, 2023 and I just received the same email 3 days ago.
Seems like those who got early access are donators (or those who have contact) and everyone else are granted access only after when they officially released the service.
I received the same email, days after I read it's now publicly available. It's kinda pointless at the moment anyway, fees are very low and unless you got screwed by an exchange that used a low fee sending to another wallet you don't control, there's no point in using this accelerator now.