@JaneJeffer I believe it was because she didn’t get enough funding support from the Russian Federation, so Kazakhstan wooed her. Apparently there’s some big oil tycoon with lots of dosh who is trying to build up tennis there.
Similar to what happened to Norrie, who previously represented NZ but was struggling to get funding support there so switched allegiance when Britain came knocking. Some of the NZ media are talking about him as the one who got away.