I used to work for a company Zillabyte that had a lot of web data. Mostly marketers and sales people were looking for lead generation. Let's say you work for

I used to work for a company Zillabyte that had a lot of web data. Mostly marketers and sales people were looking for lead generation. Let's say you work for Mixpanel, and you want to know all the websites out there with Kissmetrics installed. Even better, a report every month showing who uninstalled their analytics tools. Others looked for more general signals than javascript snippets (weak text analysis), but that was the bulk of what people asked me for.