As an artist, I am immensely interested in 3D printing. It is my new favorite medium (which is saying something after 10 years of digital painting). I came here because I wanted to connect with a community, stay abreast of new developments, solicit advice, hear people's opinions, and offer my own 2 cents on occasion.
I liked the idea of contests from the start. The problem is that they were not well organized or well advertized. Here are my suggestions to get more people to participate in contests:
1.) "Contests" should have its own forum section in a visible place (perhaps right under general discussions?). It would be a lot easier to stay apprised of what is going on and a lot easier to keep track of things.
2.) Have small, weekly contests but also consider having larger, month-long challenges with better prizes. *cough* design the Shapeways Gremlin contest *cough*
3.) Opt in/out email notification of new contests.
Personally, the reason I have not participated in the contests is because there's not much there to remind me they were even going on. Also, they did not seem very well organized. Those are my suggestions.
In my experience, people are the most likely to comment when there is:
1.) Controversy. This pretty much always gets people's attention and tends to garner a lot of comments. I'm not saying that's a good thing but it is a fact.
2.) Debates. Offer a provocative opinion and you can bet your butt, there will be people swooping in from all directions to agree and disagree. A lot of the time, these discussions tend to be very educative and enlightening. Maybe Shapeways needs a weekly debate or discussion topic? I know I'd participate. I love running my mouth.
3.) Room for improvement. People LOVE offering suggestions. There are probably a lot of people out there with really good ideas.
4.) Approachability. Shapeways forums can sometimes come across as unapproachable. You'll get someone who needs help or who is offering an opinion/suggestion and a lot of the time, they receive not much more than a yawn in reply.
That's my 2 cents for the day.