By replying in another thread, I searched around and found some Forum Ex-Staffs as follows. It's interesting to see the author of some famous books like Matering Bitcoin, Mastering Lightning Network, Mastering Ethereum, The Internet of money, namely Andreas Antonopoulos, has an account here. He was a forum moderator too.
To be honest, I was surprised. This is the first time I learned about this information. I did not know that aantonop seemed to think that the forum was a place for everyone who wanted to learn Bitcoin. I sent him some merit points and hope he comes back. Also, making decisions in the forum has become less rapid than in the past.