I think this is totally fair. At the end of the day, a shitty Wii Ware game leaves the dev paying for R&D costs. A shitty disc-based game leaves them with advertising, shipping, materials, etc. If you consider that even low retail sales would cover ads, discs, shipping, and ads, everything balances.
It's like with iPhone apps. If you know your app will suck, make it free and tell people to stop bitching. If you know your WW title will suck, don't make it. Either way, you make no profit.