I think the more productive question is to ask: how many times can you cry wolf before you lose a grade of credibility?
when a group stops large disclosed retractions and starts publishing the retraction somewhere in the Sports Section -- or worse yet : when the retractions stop.
Well, if you uncritically share Nature articles, you're a sucker. It doesn't matter too much to me. Poor choices by others helps me make money.
How does the choice to share Nature articles make you money?