The Slideshow That Used To Be One Paragraph

Ten facts, ten pages, one sentence on each, with a fresh set of adverts every time you click. The format made no sense as writing and perfect sense as accounting.

Advertising is sold per page view

Display advertising has historically been priced by impressions, meaning the number of times an advert is loaded and shown, rather than by anything the reader does.

A page carrying several advert slots generates several impressions each time it loads, and that is the unit the publisher sells to advertisers.

Nothing in that arrangement measures whether the article was worth reading, only how many times a page containing adverts was requested.

Splitting multiplies the inventory

One article on one page produces one set of impressions. The same article divided into ten pages produces up to ten sets from the same piece of writing.

The cost of producing the content does not change at all, which makes the split close to free revenue for any publisher whose readers tolerate it.

Readers do not all tolerate it, and drop off as the pages continue, so the practical gain is smaller than the arithmetic suggests but still substantial.

The reader's cost appears in no ledger

Each click costs a page load, a wait, a repeated advert and the loss of your place. None of that is recorded anywhere the publisher's numbers can see it.

What is recorded is pages per visit, which rises, and time on site, which also rises because loading and scrolling take time.

Both look like engagement improving. The metric moved in the right direction while the experience moved firmly in the other one.

Newer formats do the same job differently

Infinite scroll with adverts injected between blocks achieves the same multiplication without the clicking, which is why it replaced pagination almost everywhere.

Adverts that refresh on a timer while you read produce repeat impressions from a single page load, converting reading time directly into inventory.

Autoplaying video does something similar with a higher-value format, which is why video appears on articles that have no visual component whatsoever.

Why the slideshow faded

Search engines began weighting how quickly a page becomes usable and whether visitors return to the results, both of which the format handles badly.

Advertisers moved toward paying for viewable impressions and completed actions rather than raw loads, which reduced the value of an impression nobody looked at.

The incentive did not disappear, it changed shape. Inventory is still multiplied, just in ways that no longer require the reader to click a small arrow forty times.