Moon.win signature campaign has been put into hold.
The campaign is on hold as the escrow address does not have much balance.
[...]
Until then you are free to remove your signature and avatar if you want.
Although whirlwind.money is currently full and is on PNYC. Hhampuz announced that for some conditions it will accept applications from those exceptional members.
If you are a prominent member you may apply in this campaign even when it's full. Users could be rotated out based on performance (not based on how much you post, more about how you post).
Merit, trust, standing in bitcointalk are all factors that will be considered so if you have a low number of merit earned, no trust ratings and are relatively new you will likely to not be added to this campaign.
As for Roobet, there might be some open slots announced later.