SLower shipping options usually have the tendecy to get caught by the customs though not always the case.People use the faster shipping with that in mind, and also they cannot wait any longer for their stuff.

2) This is my personal opinion, there is no cutoff limit to what gets taxed and what is not. Example, a close friend got himself a package of games worth RM200++ but still get taxed, while i once got past customs without tax even when Play-Asia was shipping me the PSP package with invoices clearly stuck outside stating the worth of the package more than RM1000++. It is all luck of the draw.

My advice is to request Gamescore to declare the item at lower price, mark it as something less prone to tax, and also mark it as "Gift". But of course the customs are clever, you can mark down the price to RM300+ say, but ifyour item is huge and heavy and you declare it as something that is not, chances are youe package will be held one way or another. There are no guarantees here.