We ran into the curb side check-in thing last year, can't remember what airline. I was going to Tip the guy $10 (I think we checked four bags) and he said, that will be $8. I said what? He then told us about the charge. The bottom line is that while the airline is making more on this, the curb side folks are taking the loss. I think i tipped the guy $12, but the bottom line is, he would have got $10 clear, instead he got $4, and he was saying how most folks just pay the charge, and he gets nothing.
I can't fly and dive with one bag. When we fly as a family, we don't generally do two bags per person, normally we check 4 bags between the three of us. I guess if the prices remain where they are, it's not horrible. I could do one bag if they allowed 75lbs. It's not the size for me, it's the weight.