Doesn't Instagram have every device's photos' metadata anyway, when each one of those people gives it permission to access photos, and is then able to build a d

Doesn't Instagram have every device's photos' metadata anyway, when each one of those people gives it permission to access photos, and is then able to build a device specific profile and connect that with a corresponding Facebook account where some of these people may be sharing (their own) photos? Maybe the Instagram feed is using all these mixed signals, but to think that Instagram doesn't have a lot more data from each of those people's devices seems to be a bit of a stretch. I don't believe this tactic hides these people much from Instagram.