Lower current draw will be better. But 0.5A don't really matter much.

In theory, yes.
But it depends greatly how you use it. Open close regularly won't do any help.

Yes and no, it depends how we see it.
If a normal fridge cost rm1+++ while inverter cost rm2+++ for the same volume, I'll get the normal type without question much.

went to ss2 again to check on fridge prices, the price that i got was different from last month, with an increase about rm200.

they all say fridge prices increase last month.