Last I heard, negotiations for airing rights for Season 8 had barely started. I'm not saying the 170 countries won't buy the show, but I can see the asking price being negotiated down. Also, HBO doesn't make as much money off of international sales as it does subscriptions because the middlemen in international sales have to take their cut, middlemen who have their own bottom lines to protect and who will adjust their offers based on how much they perceive that the value of GAME OF THRONES has deteriorated.
Look, I'm just saying there are other things to keep your eye on to ascertain whether or not the fan fury at GoT is real or just an internet-fueled delusion. One of them is subscription cancellations. The other is if the international licensing sales turn out to be less than expected. Another is the quarterly financial reports - did they get adjusted down, or do they stay the same? (The ultimate sign that a production decimated a company's bottom line is if they have to take a write-down).
It's patently obvious that GoT made HBO a lot of money. But it also cost them a lot of money (GAME OF THRONES is the most expensive TV series ever made). They expected to make that back through subscriptions, international sales, DVD sales, licensing, etc. They have other series they are developing that they were planning on using profits from GoT to finance. So keeping an eye on what happens to subscriptions, keeping in eye on how the international sales go, keeping an eye an quarterly financials and all those other things is a good way to gauge whether the anger over GoT is just a few internet loudmouths or a genuine expression of massive fan anger.