Don't bother. Depending on what you're watching, your monthly payment for "no ads" only gets you "mostly no ads". They even have a page telling you what exceptions there are to "no ads", but it seems to be out of date since everything I watch that still has ads, is not listed on the exceptions page.
What's worse is the ridiculous idea by the fools in charge of those particular shows, that 1) they're somehow better and must have ads, and 2) that showing the same 3 ads over and over again is not going to push me to boycott every product in those ads.
The people that run these companies just amaze me at their thought processes.