competitive analysis of a website

A customer of mine would like to find more information about a website called scolller (that's 3 Ls .com). It's infinite image/video scrolling. Specifically, they are interested in understanding these 3 items so please bid accordingly. 1. Are they using any particular JS script (open source or commercial) or do you think they wrote it from scratch or adopted a particular script? 2. What is the logic for storing assets (initial analysis point to the name of the post (ex. if the post is called hello, image will start with hello and some identifier - but is there a logic to that identifier?) and then sub-domain - but not sure if there is a logic to the subdomain). Also not sure if they are optimizing images/use thumbnail? 3. What hosts are they using? (name of the host) Optionally if you would be able to determine what backend app they are using (I don't think it's Wordpress). Thanks