This strengthen my speculation which means that the owner of the site may be coming back in the future or have some plan for later because it is really pointless to leave 300 + BTC sitting for almost nothing in the site while he can gain more if he put it in a site with higher wagered counter per day. It may not seem to be "abandoned" right now but much like leaving it aside for now as the owner has stated few times that he is busy with some IRL work (?)