RedBull could afford to pay Kimi a giant salary like his old Ferrari one.
Look at the F1 Fanatic user favourites:
Look how popular Hamilton is – and it’s acknowledged/suggested in the article that his move to Mercedes caused more people to show an interest in Mercedes and bump them up the F1 Fanatic users favourites – moving them above RedBull.
RedBull could sign the second most popular driver (on this site)(and one of the most popular drivers amongst casual F1 fans), that would certainly bring some new fans to the team – and if they see that as a good signing for selling caps, shirts, energy juice then it’s a good move for them.
Doubt it will happen though.