Yeah, I agree this is pretty overblown. On GEDmatch, you basically give everyone the information in your SNP reads - you can compare arbitrary people there, not just yourself to "close" relatives. The only condition is that you give others the same access as you want for yourself. It's very useful for genetic genealogy.

Technically, you could probably get access to and scrape all that data by uploading fake data, or someone else's. It will do very little useful unless you're into genealogy.