One of our users reached out to ask if they can get 100 results per page because they can't currently. Maximum they claim to have is 48 results despite pz=100. However, there are also other problems with the API such as:
1- PZ (num) argument is probably broken, even pz=50 brings 8-10 results. Pz argument does not work on yahoo search itself, too.
2- Not only organic results html is broken, but also parsed information is incorrect as well.