That bothers me too, what if they are mining bitcoins with the energy/funds? That wouldn't seem too far-fetched for unaudited tech-savy people.
You're expecting a medium to large size company to donate to you. Those companies have a moral and fiduciary duty to know what they are spending their money on. It seems odd that the "Open"BSD project doesn't feel the need to be open about the hardware they use!
My understanding is that 1000 CD-ROM sets will bring in the CA$20K needed