Your alternatives are for the income that hosting advertisements may provide. They are not alternatives for the service that advertising itself provides.

And for that I offer in place of unsolicited advertising:

- Classifieds

- Directories

- Brochures

- Information centres

- Expos

- Local bulletins

- Store signage

- Word-of-mouth

- Sponsored events

- Trade publications

Of course these may well not have the bang-for-buck of unsolicited ads, but I dream that one day the visual pollution of third-party advertising will not be as accepted.