Perhaps to some degree, but I think that prettifies how they obtained a lot of their wealth.

I'm not saying that gangsterism is worse than being a finance capitalists or that finance capitalists do not engage in gangsterism.

But the Russian oligarchs did obtain their wealth by somewhat different means than finance capitalists in (say) UK, USA or the EU and are somewhat different.

When they (Russian oligarchs) do send their money abroad it is mostly in the form of swelling overseas accounts, purchases of luxury items, rare art etc - as opposed to Western finance capitalists who use their money to invest in capitalist exploitation processes in other countries due to low domestic profitability due to local saturation, monopoly etc, and it is that which helps define those economies as imperialist.

Whether you agree with Lenin's concept of imperialism or not - and clearly the SPGB does not - you surely have to accept that the two methods of protecting or enhancing their wealth are quite different - not better or worse - and they carry different political and military implications.