Right now there is one show I want to watch on HBO, and that's GoT.
Same with me. Thankfully (as you mention) Shaw cuts the MC/HBO package cost in half (for 3 months) every year right before GoT comes on.
I've considered just signing up for one month and watch them all on demand.
I think, if I'm still subscribed to a TV service next year, that is what I am going to do.
Gotta "play the game" if Shaw insists on multiple price increases each year.