The 2022 NSI's IRS Form 990 says it recieved $596,120.00 from Sponsorships, however, the individual sponsors aren't listed. I'm betting the stone importers are on that list. That's a nice chunk, 22%, of their $2,693,406.00 annual income. CEO James Hieb's salary of $238,077.00 is almost 10% of that. Nice gig.
Q