If you are posting on walled-garden big tech site like Reddit, Instagram, Twitter / X, the site and therefore the company certainly owns your content and all the metadata attributed to it. You're the product. This is why most of us are here on the Fediverse where things are different. Maybe if it's your personal photo you took than you can make a copyright claim to some degree and download your data tediously but once it's on their network it's generally theirs to do as they please, whether that be sell to Google or any other advertiser or use on in-house advertising. Often without proper informed consent and not always legally. It's definitely a scam, I agree. Hopefully this exposes it more and brings more people to places on the Fediverse where there's no owner/seller/buyer of your data or anything else you contributed.