The nothing has actually changed cannot be known. There is no transparency here. This is just what you think based off of their weirdly worded statements. Many people were outraged over the sponsored links here on this very site.
From that perspective it's super transparent, if you bother to look.
There's no evidence they're doing anything with any data and there never was. All of this outrage is purely centered on a ToS update which they've since refactored in response.