I've been looking at different rooms, and I looked at the dates the threads were created. It looked for the most part that Razer Insider is pretty inactive.
Its not too inactive, I have been busy with school work but I do come back here and there and it seems like it is still as active as it has been for the past year or so. A lot of the new users here are for support, and the support section is not mentioned on the main page from what I know.
There has been a lot of activity here while the zSilvers earning was high enough so everyone would have wanted advice and recommendations. Most of them kinda stopped or i think they did, after the main way of getting silvers was stopped and there was no easier way to farm. The people who are loyal to Razer and their vision never leave the Insider, even if the posts become fewer, all of them are still watching and reading them.