I don't know what portion of users we are though, I'm glad to see I'm not the only one!
The user discovery happens because the act he performs provides the exact intent you need to give him the shortcut.
Also for clarity this is only relevant for content based sites and not apps. It is vanishingly rare for users to scroll up when reading content unless they want to reach the top
This assumption is the problem. No, it is not rare for users to scroll up while reading. People are not perfect machines that read everything in one pass and understand it fully.
They may go back to re-read, or look at an earlier image or figure in the text, or otherwise. Sometimes people zone out for a minute and find they 'read' with their eyes but didn't actually take in the content. That requires going back.
For me, scrolling up to re-read is a basic use case of a web page. If it can't do that properly, it has failed.
If I were to judge from the comments here (and my own behaviours) it is quite common for users to scroll up when reading content for other reasons that wanting to "reach the top".
If the header only appears after scrolling up for a bit then it’s not so bad, but most implementations show the header after scrolling 1px up. That’s infuriating.
There is no context which makes it OK.
Wow, impressive blindness!
Seriously, have you ever used one? Because most people do not read monotonically downwards. We often scroll back to see something in a previous sentence referred to in the spot we are reading. So we want to go back one or two lines. Bot NOOOOooo, the header pops up, covers 1/4 of the screen, so now we have to scroll that much more, pushing off the screen the other text we hoped to keep on the screen, and it might even go through a few adjustments. So, now, what was a non-event less distracting than turning the page in a book or magazine has now become a fully distracting scroll-fest.
Is that clear enough for you?
>>This is literally the best ux pattern you can have.
NOT EVEN CLOSE. The best User Experience pattern is to give the reader what they asked for AND NOTHING MORE. Nothing more for you, nothing more for your advertisers, and nothing more for them. We click to read the content, LET US READ the content, ALL the content, and NOTHING BUT the content. We'll even understand if some proper STATIC adverts are placed in the content, and we might even click thru if you've shown us something relevant and interesting
But as soon as you start putting motion and other distraction in the adverts, my priority becomes NOT reading the advert, but figuring out how to get it out of my face. And if by some chance I remember it, it is filed among "companies to avoid".
Why does it seem everyone who deals with advertising, from the execs down to the programmers, so stupidly thinks only of the first-order effects — "Grab Their Attention!" — and not the second-order effects, where being so offensive — surprise! — offends people...
Stop making things "intuitive" and expose explicit options to users.