A floating back to top button just means they don't want you to waste time reading the content. You should click around and view some more ads instead. I mean,

A floating back to top button just means they don't want you to waste time reading the content. You should click around and view some more ads instead. I mean, that's the only possible conclusion I can come up with, since they give the button such prominence. It's the same with newsletter popups. You shove that in my face, obscuring all other content, it means your site is dedicated to harvesting email addresses, and you want to spam me senseless.