I know there are few questions about the risk of IMEI with various answers from rare risk to none. But my question is regarding the kind of websites that provide IMEI check services for free with some services are paid. An example is this website: https://www.imei.info/
The stats at below the page are staggering. The website has access to all these valid IMEI numbers and keep increasing. I tried to enter my IMEI and I got some accurate information like model, specs, warranty, purchase date, carrier, etc.. They are obviously not an authorized body. Or are they?
I did some research online and on academic papers and IMEI does pose a minor risk in privacy and spoofing by counterfeiters. I am asking is disclosing millions of IMEI numbers to such websites has any serious risks? Am I vulnerable after I used it?