Probably wouldn't have noticed it if you didn't mention it as I don't often check down there.
Well, better late than never eh (≧ω≦*)
It didn't state anything about having to log in so I wouldn't think so but I guess you'll find out in about 3 more days.
I feel unsure of it now because when other games closed they required you to send a support ticket to the game you wanted stuff in and say "I'm from X game that's closing and I'd like my migration gift in this game."
They sent out IWZ tickets to DP players without making them file support tickets, though, so it could go either way.
Looks like you needed to log in during the time they announced it or something, didin't get anything related towards IWZ.