To me, my understanding was Group Buys were our way of obtaining the cheapest price possible, and that the people who decided to run them were of the same feeling and wanted to help the community out. When I talked with the people about running a GB for the Spongebob caps, and they offered me to make some profit, I didn't want it. I wanted the community to get the cheapest price, and I was willing to offer my time and effort to do that.
Now, I know some GBs aren't exactly small, and they take a lot of work, but this isn't a job either. It's something you wanted to do. And I know people's arguments are that they don't make a lot of money from it, but it's still there.