Earlier quoted context omitted.
Does the fact that it is integrated into iOS keyboard have any implications? WlWhat kind of data does this have access to when I send gifs from iOS keyboard?
Google messenger (the default texting app) has a gif search that includes giphy, and Discord and slack also use giphy. What I don't see is what data FB is getting when the gif loads. OK, so they can see I am using giphy in Discord. Now what? edit: apparently wrong/outdated information.
There's also all kinds of shenanigans that they can play in the process of serving that request to harvest other meta data and help fingerprint you. Which Giphy's privacy policy mentions is already done to an extent, in the form of dropping cookies while servicing your request. Cookie abuse itself is a bit of a losing battle, as browser vendors increasingly layer on limitations and restrictions for cookies. But they're far from the only method of fingerprinting possible during the servicing of a web request.