Yes, these oligarchs got into conspicuous consumption oligarchic competitions on art, yachts etc. Most of this $$ was looted by resource fraud and military procurement fraud that pretty much ruined their military.
I recall reading about supposed military encrypted radio the Kremlin paid $10,000 each for were common radios(Walky-Talky types) that were worth under $100 as well as Chinese tires - Ukraine heard every word.