It got to the point for a while there where it was like having pop-up ads all over again, except this time the ads were all for the site I was currently reading

It got to the point for a while there where it was like having pop-up ads all over again, except this time the ads were all for the site I was currently reading. This will be abused if it's not opt-in by default (as in I need to specifically enable the feature in the browser before it starts asking me if I want these notifications).