[Xietor]

this poll is a bit silly. If you play much mp, you know revenge is a powerful motivator. Defeated players typically give away gems/gold and even allow units to be charmed to either help a friend or to hurt an enemy.

Trading items/gems is a part of diplomacy. And the mechanism exists to do do trades. Giving away stuff when all
hope is lost is part of diplomacy as well. If you are dead set against diplomacy, you can play 1 v 1 mp games, or try to start a no diplomacy mp game.

But the reason mp games are more fun than sp, apart from the higher challenge of facing humans over ai, is diplomacy.
Diplomacy is a great equalizer. A player not as good in strategy, even with a weaker nation, can defeat a better opponent with a stronger nation with help. And that may be his only hope.

Not giving away your items/gems in defeat is a bad tactical error. Giving away your stuff builds goodwill toward the player you give the stuff to, and you may get some reciprocation down the road in another game.