You may not be able to see who made which signature at the start, there aren't that many different people who enter. You can easily identify who made what based on their style. Biased voting happens in SOTW all the time.
Do you have proof that there is biased voting? and what do you propose? Tighter deadlines? A bundle of rules to make it harder to actually create a piece of work?
Its easy to sling around accusations, but every SoTW is the same, its hard to tell who made a piece even if you "know" there style it could be someone elses as the GFX'ers tend to change stylisation from piece to piece, so without conclusive evidence this just sounds like a rant tbh.