I don't think this is worth making a topic fir especially in the reputation board. We can't make topics for every campaign that is on hold, that is totally unnecessary and I don't know what topics like this is intended to achieve. You can't beg people not to leave or join the forum, people must exercise their freedom of association as they will naturally be drawn to where they find value.
If you can see many people is inactive in bitcointalk since campaigns is being reducing in the forum, and another campaign freebitcoin has put on hold due the issues people experienced with their platform for withdrawal, do you think that without campaigns this forum will be active, when you see people who removed avatar and signatures their involvement in the forum is very small compare like before, do you think that people will not leave forum as campaigns is reducing
People leaving and staying in the forum is normal thing and happened even when there were several campaigns including mixers... as people are leaving, more people are joining as well. I understand that the ban of mixers and other privacy related project also contributed in the reduction of number of active participants here because there were people that came here due to their businesses that requires some form of anonymity which mixers provided.
Now that mixers are gone, we just have to make do with what we have while hoping that other avenues will open that will create more interest in the forum and bring more traffic here.