What I meant is that ad spend for large customers has always been handled such that a budget is handed over to an agency (to the winning one of several ones competing for the budget). That ad spend is allocated to multiple media channels and campaigns; now it will have to find other, more creative ways to get the message across to the customer.

Online ads have been under pressure, and their effectiveness has been questioned for much longer than yesterday when the GDPR came into effect. The GDPR legislation has been a long time in the making, so if publishers haven't prepared for it, then they have only themselves to blame. People have certainly no obligation to sustain a rotten big-data/big-media mindset by giving up their privacy, especially when that only benefits very few.

The situation for publishers has been precarious for many years, so publishers should focus on the opportunities not risks of this change. For example, exactly because clickbait isn't going to be sustainable any longer, quality media might get a boost, and could even make a profit from paywalled content. Holding on to a model that's on its way out isn't a winning strategy.