On the rule that you always have to ask a question with an image:
“We decided to make that up front and center. You have to pair an image with your question. I understand that probably is going to be somewhat controversial. But we did a lot of testing and more often than not, an image very much deepens the context of a question. That’s why we made it so you can either take a picture with your camera and say, ‘What kind of tree is this?" Or you can pull from the photo albums you already have. Or you can get [a photo] from the Web.
“Photos are what make mobile mobile. We are really taking advantage of the fact that this is a mobile native application. ... Everyone is carrying around these great cameras. It’s a uniquely mobile experience to pair a short question with a photo.”
“It might frustrate a few people in the long run but it will only end up with better quality for us. There is a higher bar to submitting a question. As you know, I have had some luck in forcing constraints. People complain about them but then seem to like them.”
On whether there are questions that are not better with an image:
“I bet I could figure out a way that an image would make it better.”