ARES and LimeWire started hitting a rough patch soon enough around 2008 with them losing a lot of cases on copyright issues even though torrents were the same thing with minor differences. LimeWire shut down some time in 2010 following an injunction issued by a U.S Federal court. The trial investigating the damages necessary to compensate affected record labels began in 2011 and I doubt a sum has been released. ARES went off the radar once Torrents became popular and the last I've seen of people using it was back in 2011.
ARES and LimeWire were the big daddies of the P2P business who lashed out at each other to get to the top on earnings and downloads. Both of them had paid versions that supported higher speeds and better file tracking. Sadly, neither came out alive. Both these clients are now obsolete or near obsolete with icons being the only remnants of a pretty much vibrant past for its users. The world keeps changing and some people adapt while others prefer to stick on to their core and die, with or without dignity.