I use web scraping to identify and monitor fraud.
Exhibit A: https://archive.ph/0ZUA8
This website is used to recruit people to set up "lead generation" Google Business Profiles and leave paid reviews.
Exhibit B: https://archive.ph/WWZuw
This is an example of the Craigslist ad used to initially attract people to the website above.
Exhibit C: https://archive.ph/wip/7Xig4
This is one of the Google Maps contributors which left paid reviews.
If you start with the reviews on that profile, you'll find a network of Google Business Profiles for fake service-area businesses connected through paid reviews.
Web scraping allows me to collect this type of data at scale.
I also use scraping to monitor the status of fake listings. If they are removed, the actor behind them will often get them reinstated. This allows me to report them again.