> effectively nobody ever buys anything by clicking on a web ad I know I never did - at least for banner ads and other CPM advertising, but I'm not so sure it

> effectively nobody ever buys anything by clicking on a web ad I know I never did - at least for banner ads and other CPM advertising, but I'm not so sure it applies to the CPA sector. My impression (no pun intended!) is that sector is in a growth phase. On the plus side, if this means the return of advertising revenue to print media, that's an interesting development. If it doesn't, then ... where is the advertising spend going to go? Mobile? I think mobile advertising is even more universally reviled than CPM web advertising! Should the penny be dropping (pun intended) there, as well?