There is a particular kind of online content that seems to be everywhere these days: a few carefully selected pictures or short clips that can sometimes make something look far better, more interesting and more worthwhile than the content eventually turns out to be.

You see a photo or a short video clip that immediately catches your attention and seems to suggest that there is something genuinely good behind it. The free preview looks polished, appealing and carefully chosen, showing just enough to leave you thinking, “If this is only the preview, the full content must be really good.”

That little glimpse can be enough to create a sense of anticipation. You start imagining that the rest of the content will continue in much the same way, with more of the quality and variety that initially caught your attention. Sometimes it does. But occasionally, curiosity gets the better of you and you discover that the rest doesn’t quite live up to the impression created by those first few snippets.

When that happens, the disappointment can be considerable.

The full content might turn out to be little more than an extended version of the teaser, with much of it lacking the quality, variety or effort that the preview seemed to promise. What initially looked like a genuinely worthwhile collection may turn out to contain only a small selection of particularly good material, surrounded by content that is considerably less impressive.

Of course, there is nothing inherently wrong with charging for content. People deserve to be paid for the work they create, and there are plenty of creators who provide exactly what their previews suggest. The problem arises when the best few pieces are used to create an impression of quality that the rest of the content doesn’t actually fulfil.

It can sometimes feel like the internet’s version of a bait-and-switch: give away just enough to create curiosity, then charge for the rest, even when the overall quality doesn’t quite match the impression created by the preview.

There is nothing wrong with using your best material as a preview, and a good preview can certainly be a genuine indication of what is to come. The problem can arise when only the very best material is chosen to represent everything else, creating the impression that the entire collection will be of the same quality. Those few seconds or handful of photographs may genuinely be excellent, while the rest of the content simply doesn’t reach the same standard.

Sometimes the content really is every bit as good as the preview suggests, and the initial impression turns out to be completely justified. But sometimes those carefully selected snippets are simply the best parts of the collection, and the rest doesn’t quite live up to the expectations they created. When that happens, what initially looked like something genuinely impressive can end up feeling rather ordinary and disappointing.