Step 1. Set up several tiers of service (at different price points)

Step 2. In periods of network congestion, drop packets (in a way that is NEUTRAL to the content of the packet) of customers who are in a cheaper tier. (aka "Quality of Service" in networking jargon).

For Step 1, you may wish to gather statistical information then advertise to your customers about what kind of bandwidth customers may expect during congestion and noncongestion hours at each given tier.

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