Great initiative! I'm surprised that PDF is the only accepted submission format, given that folks in ML research distillation are pushing for interactive explanations and there are already several great examples (https://distill.pub/). Any reason for that?
I suppose it could be either a PDF or a web page? A web page is definitely something anyone can open and read :) For people who consider submitting an interactive web page, you could suggest them to use the Distill infrastructure https://distill.pub/guide/ and look at existing examples (https://distill.pub/). One advantage of doing so is that they could then submit their paper to the Distill journal and get more exposure.