Perhaps they reduced the minimum hit requirement for new workers - from the acceptance email I was sent:
Looks like the freeze has thawed, I just got my approval.
I got exactly the same reply to my inquiry, from "John G".
Same issue here (also in US). I registered about four days ago and am still waiting. I submitted an inquiry via their contact form earlier today...
I just won't use the second one.
My registration request has also been at the "being reviewed" stage for several days. I registered with the same account I use for Amazon Prime...