I've used the odd one for sports and also a hacked firestick. Two things though, first I find a lot of these sites to be chocked with adware and malware.
Secondly I struggle with the fact that decreased revenues by the TV companies due to piracy, will lead to a lowering of quality. The fact remains that making good TV and film is an expensive business. Even without paying the actors it's still astronomical.
If I watch something I like, I want to support it, just like I do on Steemit. So I've almost entirely swapped TV for Netflix, I'm also thinking of getting Youtube Red and Patreon accounts.