@cablefast Yes. Specifically: when you play with the "share until death" option, all your stuff is SUPPOSED to die when you die. It is part of the game. Snipe an enemy ACU: you also kill all their stuff. It means your ACU is important and you need to protect it, and your enemy ACUs are important, you can try to kill them to get a big advantage in the game.
This is the "normal" setting for team games.
The other common option (there are actually more than 2 options but the rest are only rarely used) is "full share." In full share games, an ACU's death takes a player out of the game, but their stuff goes to a teammate. Which means killing enemy ACUs is less important.
In a game with "share until death," if you sacrifice most of your army to kill 1 enemy ACU, that might be worth it because their army and their base die. In a game with "full share," sacrificing your entire army to kill 1 enemy ACU might cause your team to lose the game because the enemy team will have a bigger army, even if they have fewer players to control it. 1 player with a really big economy and a big army can often beat 2, 3, 4, or more enemy players. I could easily win a 1v4 if I had a big enough economy + army.
The "exploit" is that, a long time ago, in "share until death" games, if you thought your ACU was going to die, you could just give all your stuff (units and buildings) to a teammate before you died. Then your ACU would die, but all your stuff would survive. Which was considered to be an exploit because it sidesteps an important game mechanic to give a big advantage to your team.
In "share until death" games, ACUs are supposed to be very important because losing an ACU means a base/army dies.
There are ways to get somewhat around this. One way is you can give your base and army to a teammate a few minutes before you leave. Then they will have time to use your army (they can use it to attack something, or just send it somewhere where it is easy to scoop the mass from dead units) and they can make engineers inside your base before you leave (which will help your team to rebuild your base faster). Any engineers that THEY make out of factories YOU gave them will not die when your ACU dies . . . unless your ACU is standing next to them, because death explosion.