Rakuten bought ebates many years back (looks like 2014) but kept the ebates branding until very recently.

But, yes, it's confusing.

Yep, Kobo is now "Rakuten Kobo". I haven't yet seen this on OverDrive, which they also own. To my ear, the names don't go together quite as well, since one sounds very American/English, and the other sounds very non-English (and Americans seem to have difficulty figuring out how to pronounce it).

Rakuten is very big in Japan, pretty established. Like Amazon/eBay, but a bit different. They've also got global but quite cautious ambitions.

Interesting trivia from a friend working there, and quite unusual for a Japanese company: most (Project Management, Development, Management) internal communication above a certain job-grade level is conducted in English, including in Japan.