[travisfischer]

This is actually pretty interesting. I think many people have thought of a product along these lines and, as mentioned by others, there have been several versions of this tried.

I think the key is in the constraints you have outlined.

Obviously it's a mobile app. You take two pics and post. You then vote on other's ABs. Every vote you make on someone else's AB earns you a vote on your own. If you want a bunch of opinions on your AB you keep voting on other's. You can post to your social networks to get your friend's opinions as well. Maybe it ties into the social APIs and reads comments to extract out votes for A or B. Maybe some viral growth potential there.

I like this. I might use actually use it. Wondering if it is important to be able to choose a target segment of voters for your own AB or if the classification of "human" is good enough in most cases.

[Fizzer]

I've thought about segmenting as well. For example, teenagers don't want to rate pictures of grandmothers all day -- they want to see people their own age. You could segment it by age and region for starters.

[wingerlang]

I mentioned this idea to a client some time ago, exactly like this. Each vote gives you a vote on your own pictures. It was not in the scope of the product but I do still like the idea.