What does it cost? Nothing while we are in beta, and the library stays free afterwards. No ads.

Can I present these slides as my own talk? For a paper under CC BY — nearly all of them — yes: edit the .pptx, credit the authors, link the licence and say what you changed. For CC0 there are no conditions. A paper published here on its authors' permission alone carries no reuse grant, and its page says so. Each page states its own basis; see the licence policy.

Is my field in there? Robotics and computer vision today, with other STEM fields being added. Ask for yours from the library.

What happens to a paper I upload? It stays private to you. Publishing is a separate choice, available only to the paper's authors.