Ye its for party and also if you're alone, check the /* */ lines above that option.
The problem/solution I think should be here http://svn.l2jserver.com/branches/L2_GameServer_T2.5/java/com/l2jserver/gameserver/model/actor/L2Attackable.java calculateRewards() method. Try debugging it or removing the "if (!Util.checkIfInRange(Config.ALT_PARTY_RANGE, this, ddealer, true))
continue;" to see what happens.