The only hope is that the wheel will turn once more and forums will come back into vogue. Everything tends to come and go in cycles and Facebook, Twitter, Reddit, and all these other, in my opinion, awful methods of online communication are, gradually, beginning to lose their shine. As you say, there have been discussions across all the forums I participate in too about how to improve activity and new initiatives did nothing to improve matters. It's all very sad. I think that all we can do is play a waiting game and just keep as many topics as possible ticking over as best we can.

One other point that I will make concerns guests. Guests are not necessarily potential members. A lot of them tend to be bots, for example. There is no chance that any of these are going to register.