Pay per view - a few pitfalls
The page you arrived at via a search might be full of dross and not the information you are after, so you have been charged for content consumed but of no use - as, with search engine snippet, often no way to tell if content is worthwhile until you actually read the whole thing.
I foresee a market in junk page creation, they grab pay per view micro-credits and clog up the search results to gain cash.
Micro payment donations work, as you can donate afterwards i.e. if content was good, but visits tracked and cash auto taken (even if visit was just a quick look and thinking what a waste of time that link was, my cat could create better content) is a real Russian roulette game