[brugeman]

I guess that's mostly because there was no way to do it without intermediaries (banks, paypal etc). Which means that a) fees are generally too high to process micro-payments, b) payment processors require KYC and that's too much pain for a single-shot micro payment, plus your privacy is leaking. Some crypto projects are trying to fix this, but I don't think any of them is ready for 'normal' users.