Well the news is out that Garry Kasparov is now coaching Hikaru Nakamura. This is certainly the kind of thing that can attract publicity (and money) but is Kasparov a good choice for a coach?
I have my doubts. After the acrimonious break in his coaching relationship with Magnus Carlsen the Norwegian does not appear to be noticeably stronger from the experience. In fact he is indulging in some weird opening play (eg 1.e4 g6 2.d4 Nf6 3.e5 Nh5 versus Michael Adams) that is hardly suitable for World Championship aspirants.
Here’s Kasparov on working with Carlsen, before the break up of course..