LibFM - Binary Target

[ahmed....@gmail.com]

Anyone knows if LibFM works on binary (0/1) only target variables? If the BPR extension is the answer what would the target variable look like : (1,-1)?

If there's mostly only 1 purchase for ex. per user, do we have a 1/-1 for purchased item/unobserved sample item, so it's 50-50 %?