No, there are two threads. Because this site offers a free faucet, as well, the admin posted in both the Investor-Based Games board, as well as the Micro Earnings board. I have joined this site without making a single investment; I just log in once a day or so, and collect the blocks.

But here is the main thread in the IBG board: https://bitcointalk.org/index.php?topic=1384136.0