Commercial requirements dictated that we:
- First try to find ways to sell the material at the highest
possible low price, because
of absurdly thin margins.
- To sell at any (even a low) high price, one must provide differential
access between those who can pay and those who cannot.
- behind encryption envelopes,
- via IP domain access shields,
- password/cookie systems
- printing can be restricted,
- access can be timed,
- ownership can be conditional
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