Assuming they invested the $800 Million in sales over the last 10 years at a measely 3% per annum it must now have grown to about $950 Million. The wad of cash grows at about $27 million a year - how about writing the following:
" I will donate $3.85 as my share of the $27 million generated in interest on sold NY properties per year"
Dubs love "$$ per publisher" shit....