Anytime now within the next hour or two @BitBayofficial will announce their picture clue that contains a hidden wallet, using Steganography.
To claim the prize, you need to download their client: https://bitbay.market/downloads and the Blockchain to speed up the syncing.
Once synced, follow their Twitter feed @BitBayofficial and try find the image. They will post the clue shortly.
If you find the image, use the BitBay client to extract the hidden wallet from the image by going to File and then Key to Image. If you find the right picture it will say success. Test it on this picture: https://wallet.bitbay.market/contest.html
Then you would open account as if this was your wallet and transfer it to your wallet which you generated when you installed the client. Time is almost up.
Good Luck!
UPDATE: This competition has just ended. The wallet was found and the 4000 Bay went to @JussiMts