Like seriously, many of them are sold for stupid cheap prices like $5/ea. Or advertise unlimited movies/shows/etc for similarly unbelievable prices.
Putting aside the copyright infringement aspect of it, to me it's extremely obvious "wait... _why_ am I paying so little here?".
No, it's not because movies and shows are 99.9999% profit (spoiler: they aren't), it's because you're _paying_ to install a backdoor that will rip and tear everything on your network it can.
You like having a credit card? That's precious, it's mine now.
Look at me, I'm the network now.