Recently freebitco signature campaign has been put on hold as you can see in the below message from the campaign manager.
Thank you all for yet another great week! Unfortunately there's been no new top up to the wallet so I've had to partially cover the payment for this week. As such I'm putting this campaign on HOLD and ask you all to remove your signatures and Avatars until I hear back from TheQuin/FreeBitcoin.
Also some week back, another long running gambling site's Fortune Jack Signature campaign (if I remember it correctly) came to an end. I wonder whether the bull market and increase in the bitcoin prices have anything to do with this or if it is just an individual gambling site's decision to pause the campaigns temporarily or permanently.