There are services like this. Maxmind is one that comes to mind, which does ip reputation, location match, and will show if the email is associated with past fraud. This can be good selling intangible goods, the service is far from perfect. In my industry someone once made a very specific fraud service where companies in that industry could submit reports for email, address, paypal info which was hashed so you needed to have the info already to look up if it existed. The service had major privacy concerns and did not gain huge traction.

Make a website instead. If you have one, work on updating more content to improve seo. See where people can find you if they are looking.

How key are you to the business? Do you add anything now, and will your loss assuming you sell and are no longer involved affect it in any way? If I was on the other side this may affect how I structure a payment. If you are key and the loss is felt then a deal over 5 years to pay based on how the business does to buy you out. If not, and you just own half the business then 70k profit a year depending on growth at least a 5 multiple on that IMO and I would start around 175k.