This is a really interesting point, because at least in the UK, we're seeing a rise in regional ISPs again as companies rush to beat BT/Openreach to offering 1gbps fibre internet in areas they're not yet prioritising.
I could completely see bundling a local-focussed set of fediverse services with the subscription to be a no brainer that people might actually get some decent value out of. Also would have the benefit of the services having a steady stream of income from the subscription fees.