I'd expect pirate TV stuff to be mainly available through mail order, it's surprising you can buy it off the shelf at big box stores like Best Buy. I wonder how they weighed the income they'd get from stocking pirate TV boxes vs. how it would negatively impact their relationships with TV and streaming providers.
I think the fact that regular stores are now stocking high-seas set top boxes is more proof that streaming is too overpriced now and media companies are too greedy.