I think the "by Linus" is a bit much. He was the founder of the project but others did a lot too. Dirk Hohndel has been the project lead for a long time already.
That depends on the project, e.g. even though Linus hasn't been maintaining git day to day for probably a decade now it's still "his" project in the sense that he designed it's architecture and shaped it's early life
Check their homepage (just click on the link above). The project itself gives Linus the spotlight.
And why wouldn't they...it's not exactly a bad endorsement.