She's gotten really good at finding various streams for the games she wants to watch, and just watches those, usually with no ads. To keep the system we had to watch them "legally" was... I think "only" $90/month - $60 something plus more for 'basic sports'. Oh... but you want HD? That's even more. And you need a new satellite dish. That will be an extra $200/installation.
But had we just been a new customer... I'm sure they'd have thrown the world at us for free for the first 3-6 months.
I don't do sports, but I do remember that sky sports was on in a pub I was in recently with a football game. I don't remember seeing any onscreen adverts (there was the score, the time left, a sky sports logo etc in the corner which seemed fairly unintrusive -- certainly the score and time left are an essential viewing when I do watch England in the finals)
Obviously there's also the adverts around the actual ground, and on the players shirts, most of which seem to be for betting (when I was a kid my grandad put a couple of quid on the pools each week, but this modern stuff seems quite the scourge)
Now at half time sure, they are dripping with adverts -- despite I believe sky sports costing somewhere in the order of £600 a year, and advertising raising just 10% of Sky's revenue from the last annual report I saw.
Were you paying a legitimate provider?