I just adopted a new policy. Whenever I come upon an article that I want to read and possibly share, if the site obstructs my reading with a popup telling me to take part in their survey (or some such, I don't really pay attention to them) I respectfully close the whole tab with "No, thank you" and head over to Google to find the same topic on another site. And I share those instead.
What if there aren't any alternatives? Well, in most cases it turns out to be not that awfully important anyway. So I move on.
I urge everyone to adopt this policy. It's the only way they learn.