[rmk]

It puzzles me too. But as the other commenter here has said, it appears to be a habit of the yuppies. If you are time-poor but cash-rich, I suppose this is a good solution. However, in my experience, people do not use their time saved by doing this in high-leverage activities!

[add-sub-mul-div]

Right, I'm just thinking these services wouldn't survive if the only people using them were the ones who could afford to vastly overpay for food.