The reason for the decline in the number of post may be attributed to to different things. The mixer ban in 2023 is not even the main factor because prior to that time, the decline has already started. What I can said that every community has its time of popularity and a time where people will move on. Before this time, I was very active on Facebook, Telegram, discord and reddit but today I don't even remember my password for some of those platforms. So, this issue happens to most platforms.