The user is offline since 17th July 2023. If participants of the campaign still hold the signature doesn't mean they are getting a weekly reward as they have no/will have no alternative way as they will not be accepted on any other campaign. As they cant join on other they may promote the scam voluntarily.
correct as those account has nothing to go joining so by chance they are keeping the signature so once this scam team decide to run another signature they will have a opportunity to be chosen priority.
they are just waiting for the signal and surely will go active once again.
I have no update when did the signature stopped but since the person wearing that signature is offline since July mid , meaning it also ended near that day.