Kochetkova at least, until this season (when, as I understand, injury was an issue), has appeared somewhat regularly, whereas Bolle and Vishneva have only been appearing a few times each spring. What are the benefits for the company of spending all the money to put those sorts of dancers on the roster as non-guest principals? Is it just the prestige for the company of having them on the list, on the website, in the program, even when they're not dancing? Is it primarily to ensure that they will keep coming back for at least those few times year after year, whereas as guests they'd have to be more proactively lured back for each engagement? Some other reason? I'm just curious about whether and how this could be viewed (even if, we think, incorrectly) as making good business sense.
(And BTW I completely agree with you, Natalia. I hope to see Bolle and Kochetkova both dropped from the roster. For different reasons: Bolle is a fine artist, but he doesn't deserve a permanent position for the reasons expressed above; Kochetkova just bores me, though I completely understand some others view her differently.)