Can you define the moral line that using 99designs crosses? I think it's a perfectly moral agreement between designers, those seeking designs and 99designs itself. If it is immoral to ask someone to produce work with the understanding that they won't get paid if I don't choose it, then we have profoundly different understandings of morality.
99designs most certainly lowers designer wages. That is not an immoral act.
Lowering designer's wages is not an immoral act, of course. Still I would rather say it lowers low-end designers' wages, rather than all.
However, is it immoral to ask someone to work for below minimum wage? I believe so. Apparently the western society agrees, consequently we have laws to protect that. I'd say we do most definitely have two profoundly different concepts of what is moral and what is not.
You were just talking about the distinction between morality and legality, then you justified your position on morals with laws.
I do not believe that it is immoral to offer less than minimum wage for a job. I do not believe that any consensual arrangement between clear-thinking adults is immoral.
Isn't the issue that the designer can choose to work for less than minimal wage or not work. That's a very limited sense of consensual labour.
The exploitation of the global market is available to the commissioner (stackoverflow) in a way that is not available to the designer.
Whilst SO are enjoying a position of wealth wrought in part from the [owners] geographical location they are, here, using the lack of mobility of designers to get a relatively low cost design created. Moreover they are exploiting those who, on the whole, don't have the benefit of their wealth in order to maintain a low cost and at the same time creating a vast inefficiency in the labour performed to produce the design.
So the immorality IMO comes in via exploitation of the low paid, deflation of market price below local [labour] costs (as they are benefiting disproportionately from those high local costs), and purposefully introducing inefficiencies in to production.
You may not find those condition immoral - after all population control by virtue of below-subsistence wage levels is a natural part of a free market; some people seem to find that satisfactory.
If that's what you call immoral, do you only buy goods and services produced by workers making American/Western European-level wages? In the unlikely event that you do, isn't it morally suspect to deny workers in developing countries jobs just to maintain wages?
99designs most certainly lowers designer wages. That is not an immoral act.