I am not an expert, but it looks like epoxy resin is used to fill in the pores. You can always google for more info. Btw, resin is also the reason why the colors become deeper and more vibrant. My counter looks and feels "waxed" to the touch, and it's very dark. I saw the same granite when it was honed, and it looked much paler and I did not like the look at all. Big difference!
Either way, everyone should use what they like and what fits their budget.
Frankly, I am not concerned with keeping my sink free of water spots.
I have another refrigerator question. Went looking and some bottom freezers have a door, rather than a pull out drawer. Anyone have feelings about those?