I am a Platinum 3 player. After winning the pistol round, do you full buy, or half buy? And what is your reason? Note: I myself personally like full buying, because it boosts my confidence, but everyone in every game I play has different...

I have had someone access my account, play a few games, changed my settings and spend some in game currency. I've changed my password, buy how else can I prevent this from happening? How were they able to in the first place?