Correct but that's not the case anymore since instead of premiums having a set amount of time (100 days) they now have a time period based on when they are premium or not.

I may have understood it wrong but I'm 99% certain I did not.  From my understanding of what was explained only premiums get an indefinite amount of time so that means the second you are no longer premium you only have 20 days to renew or log in.