about wikipedia, I mean I get traffic and hardware cost much but wikipedia is hoarding money if you ask me.
Yearly donations and new features do not match. What does the Wikimedia foundation make with the money (in german)
And they use a "first I load the page, wait 1 second, the user starts reading stuff, now while the user is reading lets move the view downwards so the users needs to interact with the donation thing to be able to read again, ohhh sh*t where did the text go I think I was in that paragraph..."
The experience is bad.
Alternative to the iframe view displayed during page load as I suggested you can add an animation on the top right corner displaying Santa or a Present (it looks like a page you can flip). If the user clicks on it, he/she gets Christmas greetings and the donation thing as iframe. Something you can see here
Does not hinder the user using the page and it is viewable.