Binary labels: favs, likes and clicks - how is this generalised for both binary and number like features?

Course Q&A Machine Learning Specialization Unsupervised Learning, Recommenders, Reinforcement
1

Andrew mentions that this function is generalised for both binary and continuous variables - how is it going to work for continous features?

Week2’s video

2

You dont use the logistic activation in the cost calculation for continuous variables!