Since we were asked not to do this in the actual Olympics thread...
No they don't.
Ads are only on the highlights. Which is why, even though I'm normally watching in the evening, I will watch the full coverage program with judicious skipping.
Unfortunately, you are wrong...
I am typing this during one of the long ad breaks during the live stream of the women's mountain biking event!
That is on Discovery's Eurosport 2 channel. Maybe there are no ads on Eurosport 1? I will check that later.
Oh, super... Yet another ad break! I am going to time them. I reckon there must be close to 20 minutes per hour. Not happy!!
PS I am wondering if you were talking about Eurosport before it was taken over by Discovery? That
was ad-free live. My sub ran out last week though so now it is an ad-fest via Discovery.