In a competitive environment of commerce, it would probably cause a lot of unnecessary spite asking designers to freely comment on eachothers' work. I mean, we're already seeing this as it is now.
I think it would be nice for Logo Tournament to provide the Logo Buyers with some more Tips on getting the best designs, and ways to make it easier.
For example:
1. Remove comments from the designers on the main page of your logo site. Only comments from logo buyers on there saying what they like and don't like.
2. When the logo buyer updates their Brief, or makes a comment on their home page, it sends designers who have submitted designs an email message/alert to go check out what the logo buyer is saying.
3. A better system for the logo buyer to rank the designs by each designer. Ideally you don't want to have just 1 or 2 designers ranked in your Top 20 filling all the spots. When other designers see that (a top 20 ranked with all similar designs from only a few designers) it discourages other people from entering the contest and maybe keeps you from getting new designs.
4. Maybe a page of basic graphic design tips, and thinks to look for, like kerning, cheesy overused fonts and effects, things that won't print or shrink well in a design, etc. Maybe a page with some examples of what to look for.
5. Finally, I think it would be great if on the logo buyer's main page they were always (had to) submit samples of logos that they LIKE, and logos that they DON'T LIKE. A form that lets them upload a few JPEGs of logos that they like, and logos that they don't. Hopefully they would pick stuff that is within the context of their own company. For example, maybe you like the NIKE logo, but the NIKE logo has nothing to do with your Bed & Breakfast. But some samples of B&B logos that you like, and ones you don't, would be very helpful.
6. Maybe a page of some font "types" samples so that the logo buyer can somehow show "I like handwritten-style fonts, but I don't like thick fonts" so we know what to use.
7. I personally find the part of the Brief that shows "Styles that we are interested in: " pretty useless. Almost all contests that I enter have the exact same things noted. It seems every single logo buyer wants a WORDMARK and an EMBLEM and an ICON, but we know that is not true.
8. Maybe a color picker color wheel for the logo buyer to select some colors that they like. We already know there are "color harmony" sites out there that automatically match colors for you that work together. What if the logo buyer had access to tools like this. "Pick 2 or 3 color schemes that you like".
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Those are my thoughts anyways.