[^SmileY]

Why not use money event combined with Round_End event?

it will be much more efficient than simple set on a loop

#include <amxmodx>
#include <cstrike>

new g_LastWinner = 0;
new bool:g_AlreadySetMoney[33];

public plugin_init()
{
	register_plugin("Test","0.1","SmileY");
	
	register_event("SendAudio","MRAD_terwin","a","2=%!MRAD_terwin");
	register_event("SendAudio","MRAD_ctwin","a","2=%!MRAD_ctwin");
	register_event("SendAudio","MRAD_rounddraw","a","2=%!MRAD_rounddraw");
	
	register_message(get_user_msgid("Money"),"Money");
}

public MRAD_terwin()
{
	g_LastWinner = 1;
	arrayset(g_AlreadySetMoney,false,sizeof(g_AlreadySetMoney));
}

public MRAD_ctwin()
{
	g_LastWinner = 2;
	arrayset(g_AlreadySetMoney,false,sizeof(g_AlreadySetMoney));
}

public MRAD_rounddraw()
{
	g_LastWinner = 0;
}

public Money(Msg,Dest,id)
{
	if(g_LastWinner && !g_AlreadySetMoney[id])
	{
		if(!is_user_alive(id))
		{
			if(get_user_team(id) != g_LastWinner)
			{
				if(cs_get_user_money(id) < 800)
				{
					g_AlreadySetMoney[id] = true;
					cs_set_user_money(id,800,1);
					return PLUGIN_HANDLED;
				}
			}
		}
	}
	
	return PLUGIN_CONTINUE;
}

And i do not think it is really necessary to check loser team here, duo if player logically have minus than $800 that is because he lose some rounds