This is worrying because tomorrow is the day signature campaign participants are due to be paid. I hope everything will be fine (and a simple post or update will make it easier for worried members to rest).
Keeping that aside for a moment, we do not know if the problem is a withdrawal issue is down to signature campaign participants trying to withdraw funds or whether clients using the website for mixing are sending funds but are getting nothing back. There do not seem to be claims of the latter therefore it could be confined to signature campaign participants only. It still would not make it right or acceptable of-course but it would narrow the problem.
I did read an earlier post where they were going to roll out updates therefore this could have possibly coincided with it. Either way, if they have not replied to emails and requests to post here then it is will mean signature campaign participants will remain confused and anxious.
I think regardless of what we think has happened, Whirlwind should at the very least post here as soon as possible to explain the facts and what they will do to rectify whatever has gone wrong.