Are you a millionaire who has more money than you’ll ever know what to do with? I’m sure there are a lot of you out there, but I’m definitely not one. If you want to throw some money at an artist, I’ll do a custom portrait for you, but charge a pretty (ridiculously) hefty commission for it.
Of course, you’re welcome to just use the other “custom portrait” store item – I think it’s $100 right now. Or, you could always use the “billionaire charity” option for some reason. But, if you’re worth $10 million or so, then $10,000 is the same to you as $100 would be for someone worth $100,000. It’s all about perspective.