Where did I say there were only downsides? There are definitely upsides to this business model, I'm just refuting the idea that because there are for profit motives the downsides go away.
I hate when people mistreat the people that provide services to them: doesn't matter if it's a volunteer, underpaid waitress or well paid computer programmer. The mistreatment doesn't become "ok" because the person being mistreated is paid.