From news links and comments here on this site, especially around 2018 when Tumblr was going through repeated App Store rejections. I think people, including myself, infer it from this information:
1. Apple executives like Phil Schiller used Twitter for years.
1. Apple executives like Phil Schiller used Twitter for years.
2. Apple bought advertising on Twitter.
3. https://sreegs.tumblr.com/post/671649355334336512/alright-le...