Sure, but that has already happened. It is ridiculously easy to get almost any newspaper to print a commercial article and already now it is hard to tell the di

Sure, but that has already happened. It is ridiculously easy to get almost any newspaper to print a commercial article and already now it is hard to tell the difference between for-pay articles and genuine ones. If you have a instagram account with ~30k or so followers, you start getting offers to promote products for example. If you have less, you can still get deals, but then you have to hunt for them. But this will happen regardless of ad blocking, because it is profitable. I certainly don't know how to avoid it, except to generally assume that all content is commercial content in for-profit sites. And also on some others.