Out of my technical depth here, but it seems there could be a market for a home-based CDN, which would cache your household's (or apartment building's, or block's) most used and streamed content.
This probably runs counter to the TOS's of streaming services, but why should anyone pay for the "bits on the wire" it takes for your family to re-watch the 3rd episode of Motown Magic for the umpteenth time?
Services want to register another "play" on their servers, of course, but consider the data-caps that could be saved, and how much current network traffic is clouded by re-streams of the same song, show, movie, or whatever else it is your household/building/block is doing repeatedly.