I've been thinking about this kind of thing for a number of years (even coded a micropayment solution which was terrible). But this article reminded me of that

I've been thinking about this kind of thing for a number of years (even coded a micropayment solution which was terrible). But this article reminded me of that and just gave me a thought: What if you flipped the burden to online commerce providers? For example, stripe provides a small toggle so that your integration can add an extra 0.1% to all transactions (so your $49 SaaS offering pays an extra $0.049). In exchange you get a small JS code to embed on your marketing blog. I'm not crazy about the bitcoin bandwagon, but this seems like a good entry point for distribution. Multiple providers other than stripe can deposit to the same bitcoin address stored in your browser, and then that bitcoin address is paid out according to the sites you visited that had "opted in" to the revenue sharing.