I found some examples of consent (by Drip):

https://i.imgur.com/QPzXiWN.png

https://i.imgur.com/KiX2aCc.png

Although time will tell. My gut tells me that users will click decline and without any negative consequences (a redirect) and the dialog simply closes. Users will get used to doing that for all other EU sites and these startups marketing efforts will suffer.

Remember cookie law? Everyone I know is conditioned to click and not even look at the privacy policy.

That means overall, less profits for marketing and then lost sales.

It's going to be very interesting to see how competitive EU startups become verses US startups where in the US, GDPR doesn't exist (for now).

That said as well. Where US startups have much greater profits for marketing to non-EU regions, and EU startups cannot compete again due to less revenue due to regulations. EU startups will shrink against their US counterparts.

Again, all of this is my own speculation and lets see how things are in 2 years time.

Very interesting times ahead.