These guys have learned that sometimes selling ad concepts is easier than pitching new consumer products.

FORBES: Ad Agency Entrepreneurs Try Creative Capitalism

Sometimes these ad efforts work.

FORBES: Stunts for Blue Chips

They read what interests them, and sometimes it is an ad.

FORBES: Brand Programming Is The New Marketing And Advertising

Ad hoc is sometimes the best way to do business in as volatile a place as Pakistan.

FORBES: Magazine Article

Ad-hoc alliances of MPs sometimes form behind individual backbenchers' amendments to government bills, but such bids to change the law are usually unsuccessful.

BBC: Commons Speaker calls for sweeping new committee powers

Republican Internet consultant Patrick Ruffini sees Romney's ad challenge as evidence the GOP, sometimes criticized for failing to connect on the Web, is starting to get serious about tapping its potential.

NPR: Mitt Romney Involves Supporters in Campaign Ads

Sometimes there were happy calls about jobs: a cat-food ad that paid bills, a touring company that never made it to Indiana.

NEWYORKER: The Proxy Marriage

It might not pay, it might not drive ad revenues, it might not rally members: but sometimes those goals are just not the most important.

FORBES: Tea Party/OWS Collaborate? What's That Guy Smoking?

According to a study by Ace Metrix in Ad Age, celebrities do nothing to help sell a product, sometimes they can even hurt sales.

FORBES: Don't Hire Tiger Woods or Lance Armstrong For Your Ad Campaign

By selling ad space on the bikes themselves and on bike-sharing stations, bike-sharing providers (sometimes municipal transit authorities, sometimes private companies, sometimes a joint venture between the two) discovered they were able to cover their costs.

FORBES: Bike-Sharing Grows Up: New Revenue Models Turn a Nice Idea into Good Business