The website is nice and easy to use and the concept is fun. I love hierarchical clustering so the technology also appeals to me. But I was very disappointed by the nature of the cards, I expected hobbies or personality based card whereas almost all those I got were about political issues. Who chooses their friends based on their opinion of Brexit? That seems very unhealthy. Maybe I was unlucky.
Another thing is that even for non-political topics. The clusters that are drawn end up being political. You like anime? -> Libertaniarism cluster. You like research? -> Free speech cluster. If you dislike Libertaniarism suddenly you no longer match up with people who like Anime. That's the danger of unsupervised learning, it might be interesting to impose some constraints on it so that you can control which topics get compared together.
Another thing is that even for non-political topics. The clusters that are drawn end up being political. You like anime? -> Libertaniarism cluster. You like research? -> Free speech cluster. If you dislike Libertaniarism suddenly you no longer match up with people who like Anime. That's the danger of unsupervised learning, it might be interesting to impose some constraints on it so that you can control which topics get compared together.