To add at least some substance, a big one is how you go about buying extreme luxury goods. If you want a private jet, million dollar car, yacht, down to bespoke ultra high end watches, suits, etc. you schedule an appointment and get vetted before you even walk in the door. It's not a showroom affair where you just walk in and buy something.
I'm young and don't make a huge amount of money but I'm a racing crew for a few yachts competitively so I'm exposed to and worked directly with some people with net worth's anywhere from a few million to a few hundred million.
The reality is that happens with dollar amounts even less than what you'd think. If you want to go buy a used $100,000 fishing boat. Nothing crazy, definitely not a yacht, the salesperson is likely going to run a background and credit check on you before scheduling a test drive or tour.
It saves everybody time and prevents those who are unable to even afford the fuel on the thing from wasting the salesperson's time or clogging up a showroom.
Even the realtor I used to find my $1XXX/month apartment had me consent to run a soft credit check before she would schedule tours with any of the higher-end buildings within my price range.
