they change your account store region to argentina or russia , then purchase the game from their account (argentina or russia) currency and gift the game to you

but many seller still charge you malaysia steam region store price minus the 10-15% discount they give you

if you are caught doing so, your account will be limited or permanent account closure

they don't touch your account region, it mean they are cashing out their steam wallet fund they gain profit from selling dota 2 or csgo items from steam market

doing this also bannable from the seller side as it consider commercial purpose

yeah, but i don't think it possible to gift games to newly added friend anymore

when you reach certain amount gifting steam games it will automatically disable your account from gifting anymore games