Hi nizzy!
I'm not sure if you're looking in the right spot but the thread with the Open Threads listings is located
here and does mention a list of threads players have noted anyone is welcome to join. I would suggest looking towards the end of the list as the newer ones are much older and players may have long since left.
If you're looking at the "
Open Roleplay" section then you're actually looking at our board for essentially Alternate Universe threads of SotE where anything silly or dastardly can happen without killing off the rest of the game for everyone else (for example world destruction).
If you have ideas for a thread you are more than welcome to also post them in the
Plotting Center or take a look what others also cooking up there.
Hope this helps! If not just let us know :)
Happy writing!