21.  Instead of being paid for a story he wrote for the magazine recently, he was given advertising space for his greeting cards.

22.  Instead of paying for the cows, however, The Star is providing advertising space that is separate from news coverage.

23.  It also offers travel planning information and sells advertising space on those pages.

24.  It would pay for construction and make a profit by selling advertising space on them.

25.  Its business comes through word of mouth and donated advertising space.

26.  Many Web sites earn money by selling advertising space.

27.  McNeil likened it to a newspaper agreeing to run antidrug messages in news stories and then gaining additional advertising space as a consequence.

28.  Most online guides sell advertising space, known as banners, on their Web sites.

29.  Most companies rent space on the systems of Internet providers and then sell advertising space.

30.  Much more is typically spent to promote a new magazine on what are called trade campaigns, aimed at agency executives responsible for buying advertising space.