[URSpider94]

>> and the equipment was leased. >What does this have to do with anything?

I believe the point is that IBM retained title to the equipment and was part of an ongoing business relationship. If they'd sold equipment to the South Africans, then anything after that was out of their hands (excepting perhaps a support contract). With a lease, every time it came up for renewal, they would have the option not to renew and pull back the equipment.

In general, I feel like you're looking at this as if it were a single over-the-counter transaction at a moment in time. Reality for an installation like this is that IBM were likely engaged directly with the S.A. government for a period of years, over which time it's likely that they got SOME sense of what the government was using this system for.