Well, I think existing ICO pages are remaining, but without ads, just for conversation and any updates for community
I actually heard from someone that some of their pages were locked out and they were told to contact the admin to get it sorted out. I would not blame them anyway, it is for a good cause and I am sure a lot of users could have complained, maybe after getting scammed by some of the adverts. They had a very good reason to stop the adverts, but in terms of the impact it would have on ICOs, I doubt if it will ever be much.