Dedicated threads are listed there if the OP of the thread requests an add, or the baker finds it through a post and adds it.
Threads fall off the board in time and if so, the links die and the baker deletes the entry. It's ever evolving. No threads, nor freedom of speech are censored. Welcome, newfag.
What would make you STFU about bots and start doing some work around here? Lay it down because you're a fugging headache repetitive pain in the ass right now, and distracting from what you say you believe in, which is human research.