I never get this, i set the DNS on my router and use the router to hijack the entries and force it to use the router's set DNS. For those of you who set it on your PC and still get the ads, did you also set up your router or is it the one given by TM? Because i dont see TM doing interceptions on the WAN side of things like what BT does in the UK with their network that irregardless their network does intercept DNS and possibly http (its how they block websites).

https://developers.google.com/speed/public-dns/docs/using
Give this a try. theres both ipv4 and ipv6 DNS servers.