Over $32m in investments sitting in ARRL's coffers. No wonder they figured they could go for broke on a ransom demand and hope for the payout.
https://www.arrl.org/files/file/About%20ARRL/Annual%20Report... - pg 44(ish)
https://www.arrl.org/files/file/About%20ARRL/Annual%20Report... - pg 44(ish)