Because I want Facebook to be free... just like I want Google to be free and Gmail and Google Maps and my news site and my sports site and my fantasy sports app and...and...and...and...

I understand that an ad model is what allows me to do many things I do on the internet without cost. Now, if I have to choose between an ad model that shows me "Dewalt Tools 25% off" (Something I am interested in) or "Gluten Free Bread" (something I'm not interested in), I will select the former.

Advertising is a race to the bottom. As long as GDPR affects everyone more-less equally, it'll only reduce the current depth of advertising hole. That is, non-targeted ads might become more profitable again.