In general you are absolutely correct that ANN thread is to discuss anything related to the business, there is also no specific rule that we are not allowed to talk about it but it is just rare to see ANN thread is being used to discuss about the payrate of the signature campaign too much/further. At least I do not see people talk about the payrate of the signature campaign in other ANN threads. In my point view, ANN thread is better to be used to discuss more about internal things that we can find on the casino's site, such as promotion, games, deposit/withdrawal etc.
So what if certain discussion is or isn't rare? People tend to talk about what's interesting to them at the moment, that's what natural conversations look like. And right now, the return of LL and the signature campaign are the most interesting topic. If anyone has something more interesting to say - feel free.
As with any other type of discussion, it will die its natural death, so need to panic.
Did I say, create a separate one there?
Yup, you did:
Now let the ANN thread serve its actual purpose and if you still want to discuss further then I suggest you create a separate thread somewhere appropriate.