@cstross I don't disagree about the damaging effects of the surveillance advertising model ... but was micro-billing a practical option? We don't seem to be able to make it work even now.
Part of the problem is that the most promising attempts seem to have been inextricably linked to That Crypto Bullshit™, discouraging take-up. And if micro-billing ever does take off, it won't be immune to the same kind of perverse incentives as the ad model (although the effects may be less disastrous).