[P] python-recsys (SVD) with implicit feedback rather than ratings (recommender systems). • r/MachineLearning

Check out Crab if you haven't already. SVD will probably not work well off the bat, unless you have a way to mark "unmeasure/NA" pieces and avoid those in the SVD computation. Some sparse SVD implementations may have this, but I don't know any offhand in Python. You can still do 0/1 (2 score) rating with recommender systems, though if you have extra information (confidence) that can help. This 0/1 setup is really similar to "click through prediction", or CTR as well which is a huge field (and again, $$$ related) - check out some code that is awesome (I didn't write it, but learned a ton from it), also see the discussion in the old Kaggle competition I link to in that gist.