Shall I send flowers, or will they accept a small check?
No need to do either. As the article above shows, they are all moving to their new homes in Paradise, where they don't have to deal with the IRS.
Note that the reason that there are fewer billionaires in the US is because they are all being forced to move offshore, which accounts for many of the new foreign billionaires.
Just keep in mind that as more billionaires are forced to leave, those Americans who are left here will have to make up the difference in much higher taxes.
Terrible, just terrible. Who shall come to their aid?