Recently freebitco signature campaign has been put on hold as you can see in the below message from the campaign manager.
It is put on HOLD because of issue with a campaign wallet top-up and it might return when the company tops up that wallet for the campaign manager.
Also some week back, another long running gambling site's Fortune Jack Signature campaign (if I remember it correctly) came to an end.
The campaign with FJ is different and it was paused because there are internal changes in the FJ team and reasons of pause of two campaigns are different.
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.
A bull run is good time to advertise gambling sites because people who get easy money from a bull market, will more easily to spend money for gambling.
If reason of campaign pause is because of Bitcoin price rise, both FreeBitco.in and FJ would have stopped their campaigns many years ago so my interpretation is, Bitcoin price is not big problem.