Putin has opened the breadbasket of Russia to many of these farmers and their families. Russia gains: food production and reliable, decent residents. The farmers gain safety, a government that will protect them, and the ability to plan ahead without the sword of land seizures over their heads. Catherine the Great did the same thing in Russia and the Ukraine with German farmers; many of their descendants live in the Dakotas and Minnesota where they farm to this day.
In Russia, they'd have to contend with extortion by mafia goons and corrupt government officials. That's probably preferable to having their land taken outright and being hacked to death by machetes by marauding Bantu hordes, but the US would still be a better choice for them, at least while we have a sane President (if we had another Obama, I'd say that the South African farmers would be better off rolling the dice and heading to Russia).
Lawrence Welk being one of the more famous decendents of German Russian farmers who settle in North Dakota.
In western North Dakota one can even find a Russian Orthodox Church or two!