Probably more interesting is the question of what's stable in 2030. There are steps governments could theoretically take to really turn the tide of things. One of my favorites is a 1-cent-per-impression advertising tax. I am well aware of how expensive that it relative to a normal ad impression today; it's part of the point. Let the really lucrative stuff like luxury goods and mesothelioma ads continue, but kill the massive surveillance industry sprung up to wring literally .001 cents per impression more out of you at the cost of creating 80% of a ready-made police state. I think the costs the advertising industry are externalizing on to us are hard to overstate; I would quite literally and with full knowledge of what I am saying put them as on par with environmental externalities.
I have always been intrigued by the idea of micro transactions. In a modern formulation, duplicate Reddit, but replace upvotes with 0.001 cents donations (to who? I don't care). If you hold shift and click the up arrow, it'll do 0.01. Hold control shift and click for 0.1 cents. Then have larger options you can drill into. People would throw around a lot of mili-cents. But at some point, "whales" would be sure to emerge as well.
I have no idea why this isn't happening, thus I must assume there are legal and financial barriers to implementing it.
For a lot of people, facebook is basically the internet. It's their messenger, their photo album, their event calendar, and their community church group.
Having the cost somehow bundled with bandwidth would make it seems a lot less significant a fee.
Otherwise I agree, an internet where every community wants $5/m here and $5/m there is basically the multi-streaming-tv hell that people complain about.